manual for waterjet ff410

Kamewa FF410

Instruction manualKamewa water jets

FF410Instruction manualKamewa water jets

Table of ContentsPreface . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

About the instruction manual . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . 3

1. Safety instructions1.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . 51.2 Driving the boat . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . 51.3 Maintenance work . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 8

2. Introduction to the FF-series2.1 Water jet unit . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . 112.2 The control system . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . 15

3. Operating the boat3.1 Maneuvering the vessel . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . 193.2 Operating in shallow water . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . 433.3 Operating through flotsam and seaweed . . . . . . . . . . .. . . . . . . . . . . 453.4 Operating in heavy seas . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . 463.5 Emergency operation . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . 473.6 Control system calibration with LCD display . . . . . . . . . .. . . . . . . . . 50

4. Starting and stopping4.1 Before starting . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . 534.2 Starting the engine and the water jet unit . . . . . . . . . .. . . . . . . . . . . 534.3 After starting . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . 544.4 Stopping the engine and water jet unit . . . . . . . . . . . .. . . . . . . . . . . . 55

5. Maintenance instructions5.1 Maintenance schedule . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . 575.2 Laying up . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . 675.3 Fault-tracing . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . 69

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FF410Instruction manualKamewa water jets

6. Removing and installing6.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . 716.2 Tools for removal and installation . . . . . . . . . . . . . .. . . . . . . . . . . . . . 726.3 Removal instructions . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . 746.4 Installation instructions . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . 91

7. Technical information7.1 Technical data . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 1177.2 Recommended lubricants and sealants . . . . . . . . . . .. . . . . . . . . . 1177.3 Tightening torques . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . 1187.4 Conversion factors . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . 119

8. Spare parts8.1 Ordering spare parts . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . 1218.2 Spare part series 1, 1–2 seasons or a maximum of 1500 hours of

operation . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . 1228.3 Other spare parts . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . 124

Glossary . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . 127

Rolls-Royce Oy Ab 2182001

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FF410Instruction manualKamewa water jets Preface

PrefaceThank you for choosing us as the supplier of the water jet unit for your boat.

It is the responsibility of the operator to ensure that the water jet unit ishandled and cared for in a safe and correct manner. Therefore you shouldread the instruction manual thoroughly so that you learn how to operatethe controls and other equipment safely before casting off for the first time.In particular pay special attention to the safety information.

To obtain trouble-free operation with low wear the water jet unit must bemaintained and stored in accordance with these instructions. To avoidpersonal injury and damage to the equipment, follow the instructionmanualwhen operating, servicing and maintaining the water jet unit.

Rolls-Royce accepts no responsibility for any damage that occurs as aconsequence of work carried out by non-authorized personnel.

Please feel free to contact Rolls-Royce if you have any queries regardingthis equipment.

We wish you success with the new water jet unit.© 1998-2007 Rolls-Royce Oy Ab. We reserve the right to make changes.

About the instruction manualIn the instruction manual you will find safety information, a general intro-duction of the water jet unit, the basic theory for maneuvering a boat witha water jet unit, the main maintenance instructions, technical data and aspare parts catalogue. Finally there is also a glossary containing the mostcommon terms.

You will find enclosed drawings and documents in section “DRAWINGS”.

Always have the instruction manual close to hand. Store it in a safe placeand do not forget to hand it over to the new owner if you sell your boat.

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FF410Instruction manual

Preface Kamewa water jets


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FF410Instruction manualKamewa water jets Safety instructions

1. Safety instructions

1.1 GeneralRead this chapter very carefully. It concerns your personal safety. Thischapter describes how the safety information in the manual is presented.There is also an overview of basic boating safety for boating and care ofthe water jet unit.

Warning!If these instructions are not followed, there is a risk of personal injury, se-rious damage to the product or property or major operating faults.

Caution!Draws attention to factors that may cause damage to the product or prop-erty, or operational faults.

NOTE!Draws attention to important information that facilitates maintenance oroperation.

1.2 Driving the boat

The new boat

Caution!Carefully read the instruction manual and other information supplied withthe boat. Learn how to safely handle and operate the engine, controls andother equipment.If this is your first boat or you are inexperienced with this type of boat, werecommend that you practice maneuvering the boat in a quiet and calmarea. Make sure you learn the handling characteristics of the boat at dif-ferent speeds, water and load conditions before casting off on your first“real” trip.Remember that according to the law, anyone in charge of a boat is requiredto know and follow all traffic and safety rules and regulations at sea. Checkwhich regulations apply to you and the waters in which you will be sailingby contacting the relevant authorities or marine safety organisation.It is a good idea to take a mate’s course. We recommend that you con-tact a regional boating or marine safety organisation for information aboutsuitable courses.

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Safety instructions Kamewa water jets

Accidents and near misses

Caution!Statistical evidence clearly demonstrates that insufficient maintenance ofboats and engines, and a lack of safety equipment are the major cause ofaccidents and near misses on the water.Ensure that your boat, engine and water jet unit are maintained accordingto the instructions in the relevant instruction manual and that all essentialsafety equipment is on board and functional.

Safety switch

Caution!We recommend that you install and use a safety switch, especially if yourboat is capable of high speed. The safety switch stops the engine if thepilot falls and/or loses control of the boat.

Daily check

Caution!Make a habit of carrying out visual inspections prior to operation (be-fore starting the engine) and after operation (after the engine has beenstopped). This will help you to quickly identify potential leaks or other ab-normalities.

Caution!Check that the impeller shaft rotates freely.

Caution!Check the oil level in the bearing housing.

Caution!Check the oil level in the hydraulic tank.

Before starting for the first time

Caution!Check that there are no foreign objects in the inlet duct or impeller housing.


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Maneuvering

Warning!The braking effect is extremely powerful if the reversing bucket control isshifted to full reverse when driving ahead at high speed. Avoid heavy andsudden steering and ahead/astern maneuvers. There is a risk of those onboard falling down or overboard.If full steering lock is applied at high speed the boat will turn sharply. Thisproduces high side forces and may cause personal injury and equipmentdamage.Never drive close to bathers or in areas where it is reasonable to expectthat there may be people in the water. Take care when maneuvering inharbours for example. Because of the power of the water expelled by thewater jet, injury can be caused even when maneuvering at low speeds.The suction in the inlet duct presents a risk to people and objects in thewater under the boat and close to the inlet opening. There is a danger thatthese may be adhered to the inlet duct and cause major damage or sufferserious injury. It is the responsibility of the captain/operator to ensure thatthe area around the inlet opening is clear of people or objects.

While driving

Warning!Never open the anode hatch or the inspection hatch when the engine isoperating.

Warning!If the water jet unit disengages or the engine stalls while driving, there isno steering or drive force and the boat cannot be maneuvered.

After driving

Caution!When the boat is not in use, the reversing bucket of the water jet unit mustbe in the “full ahead” position and the steering nozzle turned so that thepiston rod is inside the steering cylinder. This is to protect the piston rodsfrom corrosion and fouling.

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1.3 Maintenance work

Prior to maintenance

Caution!There are directions for safe and correct maintenance and service pro-cedures in the instruction manual. Read through them carefully beforebeginning work.Never attempt an operation if you are not completely confident of how todo it. Contact Rolls-Royce if necessary.

Undertaking any work envisaged by this document may either directly orindirectly create risks to (1) the safety and health of the person undertakingthe work or (2) the water jet unit and/or its components whilst the work isbeing undertaken.

It is the responsibility of the user to ensure that appropriate controls andprecautions are identified and applied in relation to the work envisagedby this document in accordance with relevant statutory, legal and industryrequirements to protect the health and safety of the persons undertakingthe work.

It is also the user’s responsibility to ensure that appropriate controls andprecautions are identified and applied in relation to work envisaged by thisdocument to protect against risks to the water jet unit and/or its componentswhilst the work is being undertaken.

Neither this document, nor its use, in any way absolves the user from theirresponsibility to ensure that the controls and precautions referred to aboveare implemented.

If, whilst undertaking any work envisaged by this document, you becomeaware of any Rolls-Royce product design related feature which could cre-ate risk to a person undertaking work or to the water jet unit and/or itscomponents please contact After Sales department at Rolls-Royce Oy Abimmediately.

It is the user’s responsibility to make all relevant hazard identifications andrisk assessments of all the activities associated with the use of this docu-ment.

It is the user’s responsibility to design and implement safe systems of workand to supply safe equipment (including, without limitation, safety equip-ment) and training (including, without limitation, health and safety training)to anyone using this document to work on products to which it relates.


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A user without the relevant experience of working in accordance with thisdocument or with products, or similar products, to which it relates shouldseek appropriate advice to enable them to identify the appropriate healthand safety controls and precautions and controls and precautions to pro-tect against risks to the water jet unit and/or its components whilst work isbeing undertaken. Technical assistance can be sought from Rolls-Royceand will be subject to Rolls-Royce’s terms and conditions.

While carrying out maintenance work

Warning!Never work alone when removing or installing heavy components, evenwhen using the safe lifting equipment such as lockable pulleys. In mostcases two people are required when working with lifting equipment; one tooperate the lifting equipment and the other to ensure that all componentshave sufficient space to move freely so that they are not damaged duringthe lift.

Warning!Make it impossible to start the engine by disconnecting the electrical sys-tem. Secure a warning sign on the instrument panel - “Maintenance workin progress!”

Warning!The intermediate shaft should only be adjusted with the engine stationary.

Warning!Never open the inner inspection hatch and the anode hatch before check-ing that the water level is lower than the hatch openings. The boat may sinkif water can enter the boat through the opening. Never leave the hatchesopen when the boat is in the water.

Warning!The water jet unit hydraulic system operates under extremely high pres-sure. This pressure may be high even when the engine is not operating.Always take great care when opening nipples. Carelessness can result ininjury. In addition, the oil may be hot and cause scalding.

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Warning!The chemicals used (for example sealant and thread sealant) can causeskin irritation. Follow the safety instructions on the product packaging.

Warning!Use only componentsmanufactured or approved by Rolls-Royce. Remem-ber that components that appear identical to approved components maynot fulfil the requirements.

Warning!Ensure clean conditions and take great care when installing.

After maintenance

Caution!The oil in the bearing housing must be topped up before the water jet unitis operated.

Caution!The water jet unit must not be operated dry, since the rubber bearing andthe mechanical sealing require water lubrication.

Caution!The tightness of the bearing tensioner nut should be checked after approx-imately 30 hours of operation and should be re-tightened if necessary.


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FF410Instruction manualKamewa water jets Introduction to the FF-series

2. Introduction to the FF-series

2.1 Water jet unit

Main components of the water jet unit

3

4

5

6

7

89

1410

12

13

1. Reversing bucket2. Steering nozzle3. Guide vane chamber4. Impeller5. Impeller housing6. Steering shaft7. Inlet duct8. Anode hatch

9. Bearing housing10. Inspection hatch11. Reversing cylinder12. Serial number plate13. Oil dip stick14. Shaft flange

-

/

Rolls-Royce Oy Ab, Finland

Type:

Unit number:

Date (month / year):

Kamewa

1

2

11

Figure 2-1. Main components of the water jet unit.

NOTE!Refer to the enclosed “assembly drawing” for more information about thewater jet unit components.

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Introduction to the FF-series Kamewa water jets

Description of function

Water enters through the inlet duct. The base plate of the inlet duct ispositioned flat against the hull of the boat. Water enters both as a result ofthe movement of the boat and due to the action of the impeller, which sucksit in. At low speeds, most of the water is sucked in, while at higher speedmost of the water is pressed in. The pump is said to be operating at heavyor light load. Inside the inlet duct the speed of the water slows, causingthe pressure to increase. There is a further increase in pressure abovethe impeller until the guide vanes in the guide vane chamber eliminate therotation of the water flow. This maintains the energy generated by therotation. The flow of water then accelerates via the guide vane chamberand the trim nozzle (which is located on the end of the guide vane chamber)and out in to the air. It is the difference between the ingoing and outgoingspeeds which generates thrust. This can be explained using the impulselaw:

where

T thrust (N)ρwater density (kg/m3)Q volumetric flow (m3/s)Vout average speed out (m/s)Vin average speed in (m/s)

Function of the reversing bucket

The ahead/astern movement of the boat is controlled with the reversingbucket. The reversing bucket is infinitely variable between three main po-sitions to obtain the speed and control needed for different maneuvers.

1. Full ahead positionWhen driving full ahead the reversing bucket is in its upper position,i.e. completely raised. The jet of water is now unaffected by the re-versing bucket and thereby the maximum ahead thrust is obtained.


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2. Zero thrust positionAt the zero thrust position the reversing bucket deflects the major partof the jet of water in a forward/downward direction, while the remainingpart of the jet of water passes unaffected. The forces are equal, andthe boat is neither moving ahead nor astern. Zero thrust is obtainedwhen the reversing bucket is lowered about 70%.

3. Full astern positionAt full astern position the reversing bucket fully deflects the jet of waterin a forward/downward direction, i.e. the boat is reversing.

Function of the steering nozzle

Sideways movement of the boat is controlled by the steering nozzle. Thereare three main positions with infinite variables in-between:

1. Full steering lock starboardFull steering lock starboard means that the steering nozzle is turned30° to starboard side. Due to the deflection of the jet of water a sideforce is generated which turns the boat to starboard.

2. Steering nozzle straightWhen the steering nozzle is straight the jet of water is unaffected,which means that the boat will move straight ahead, or astern, de-pending on the position of the reversing bucket.

3. Full steering lock portFull steering lock to port side means that the jet of water is deflectedto port and the generated side force turns the boat to port.

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Advantages

General water jet unit advantages to a propeller installation:

• As a rule of thumb, the water jet unit gives higher overall efficiency,in comparison with a corresponding propeller installation, at speedsexceeding 25 knots.

• Superior maneuverability at all speeds.

• No underwater appendages which results in shallow draught and safeoperation.

• No risk of overloading the engine, low noise and vibration levels. Thismeans longer service life and low maintenance costs.

• High thrust at low speeds, giving fast acceleration.

Competitive advantages of the FF-series over other water jet unit manu-facture:

• Lightweight and tough. Fabricated in aluminium and with thoroughstrength calculations.

• Easy installation. Delivered painted and complete with a structurallydimensioned inlet duct for easy installation by means of bolting orwelding. Direct drive possible.

• Easy service and maintenance. Wear parts are easy to replace with-out any special tools. Low risk of damage. No gear shifting.

• Best corrosion resistance. Fabricated of marine aluminium. Impellerhousing is lined with polyurethane to minimize wear and corrosion.


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2.2 The control system

General

Vector stick is a joystick controlled thrust vectoring system designed specif-ically for small and medium sized craft. All propulsion devices are inte-grated into a single joystick such that joystick movements correspond toexact vessel movements.

The vector stick system integrates control of water jet steering and revers-ing functions and engine speed in such a way that translation and rotationcommands are as simple as moving the stick in the direction you want thevessel to move and turning the helm in the direction you want the vesselto rotate.

The system can be configured for a twin or single water jet installation. Thebasic system, which includes all necessary functions, can be expandedwith a number of standard options in order to fit the actual installation. Thecontrol system requires 24V DC for operation.

Basic functions

The remote control system is used to control the steering nozzle angleand the reversing bucket position of the Kamewa water jet system, alongwith RPM of the main engines. The steering nozzle angle determines theport/starboard direction of flow from the water jet, which in turn, inducesa turning moment to the vessel in the direction that the nozzle is pointing.The reversing bucket position determines the amount of the total waterjetflow that is deflected ahead, which in turn, induces a proportional reversingforce. The engine RPM relates to the power output of the water jet and thethruster RPM relates to the magnitude of transverse thrust applied at thebow.

Maneuvering is performed from a control station equipped with the twobasic control devices; an electronic helm and a two-axes joystick. If sup-plied, additional devices such as control levers and steering tiller may alsobe used to maneuver the vessel.

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System architecture

Figure 2-2. The system architecture of a basic twin jet installation

Each system requires a single control box. The control box is a sealed en-closure that contains the electronics and software required for positioningthe steering nozzle and reversing bucket as well as controlling bow thrusterand engine RPM. The control box is typically located in the pilothouse orconsole.

Figure 2-3. The system architecture of a basic single jet installation


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The standard configuration requires a helm and a two-axes joystick. Noother controls are necessary, as all three control axes (for-aft, transverseand rotation) are mapped directly to vessel motion. For added versatility,however, separate control levers are offered as an option. Other optionssuch as clutch control and water jet and engine backup systems are dis-cussed in the sections below.

Main components

Figure 2-4. A basic control station

The standard scope of supply for the basic system consists of the followingmain components:

• Control box

• Two-axes joystick

• Steering helm

• Feedback assemblies

• Cables

NOTE!Refer to the enclosed system diagram for information about the specificconfiguration of your application.

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Optional equipment

In addition to the earlier mentioned basic components necessary for a func-tional control system, the system can be expanded with a number of addi-tional components/functions.

Additional control station

Two-axes joystick with steering wheel provided with cables.

Clutch panel

Engage, disengage, and backflush control for each engine, as well assafety interlocks and LED indication of clutch status.

Steering tiller

Single axis transverse control lever used for steering control as an alter-native to the steering wheel.

Separate control levers

Separate control levers incorporate the control of port and stbd reversingbuckets into each respective lever while also controlling RPM.

Back-up panel

Separate complimentary system providing a simple “non-follow up” (2-axesjog levers directly connected to the hydraulic valves) control if the mainremote control is faulty.

Engine back-up panel

Separate complimentary system which enables control of the engine RPMby means of a simple knob in the case of an electronically driven engine.The speed signal generated by a rotary knob goes directly to the electronicgovernor and is isolated from the automatic system by the auto/backupswitch.

Indication panel

Separate system for indication of the steering nozzle and reversing bucketpositions. The positions are shown with analog indicators.


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FF410Instruction manualKamewa water jets Operating the boat

3. Operating the boatOperating the boat with water jet units is different from operating a boatwith propellers. Read this chapter carefully before casting off on your firsttrip.

3.1 Maneuvering the vesselThe Vector Stick control system has been designed so that all maneuvers,both high speed transiting and docking, can be executed intuitively.

Cruising/Transiting

In transit mode, imparting forward and aft thrust to the vessel is accom-plished via the control levers, while the vessel’s heading is controlled byturning the helm in the desired direction of rotation. The port control levercontrols port reversing bucket and engine RPM, and the stbd lever con-trols stbd reversing bucket and engine RPM. A programmed relationshipbetween the bucket position and RPM is implemented such that the leverposition is proportional to thrust imparted to the vessel. When ordering athrust magnitude with the levers, the system simultaneously generates amain engine RPM command and a reversing bucket command.

When the lever is in its center detent position, the engines are set at idleand reversing buckets are set to a position (neutral bucket) giving equalahead and astern thrust, resulting in zero thrust.

Steering of the craft is accomplished by rotating the steering nozzles fromside to side. Steering nozzles and hence the craft heading are controlledby rotating the electronic helm.

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Operating the boat Kamewa water jets

Transferring to transit mode

When transferring from joystick to control lever operation, both the joystickand levers must be placed in their center detent positions. Once this isdone, quickly depress the push button located on the control lever paneltwice. When the status LED is illuminated steady, the system is in controlin transit mode, and the joystick is no longer active.

Maneuvering/docking

When maneuvering at slow speeds or docking, the control system shouldbe transferred to the docking mode (see Figure 3-1). In this mode, thejoystick is allowed to move freely along the X and Y-axes, and the steer-ing nozzles, reversing buckets and engine RPM are individually controlledsuch that a net thrust is imposed at the vessel centroid at a magnitude anddirection that corresponds to the joystick position.

To enter the docking mode, first ensure that the joystick and the controllevers are in their respective center detent positions and then quickly de-press the push button on the joystick panel twice. (Note: A safety interlockprevents the system from entering docking mode if the joystick is not inthe center position). In this mode, vessel translation is controlled by thejoystick position along the X and Y-axes, and the turning moment is con-trolled with the helm, similarly to steering maneuvers in transit mode.

If while in docking mode either of the clutches is disengaged, the followingtakes place:

1. A control system alarm output is generated.

2. The LCD display indicates “Dock mode fault” and that a clutch is dis-engaged.

3. Sideways vessel translation is inhibited (x-axis movement of the joy-stick has no effect on thrust imparted to the vessel), while fore/aftmovement of the joystick will remain functioning normally (i.e. fore/aftthrust imparted to the vessel is proportional to handle position).


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Figure 3-1. Docking mode — Thrust ahead

Alongship movements

Alongship movements are obtained by moving the joystick leverahead/astern (direction 0° or 180°). There is a combinator relationshipbetween the reversing buckets and engine RPM. The thrust generatedis dependent of the magnitude of the joystick lever movement. For smalllever movements the system will work only with position of the reversingbuckets, but if more thrust is ordered, the engine speed will be increasedas well.

Transverse movement

Transverse movement of the vessel is achieved by moving the joystickin the direction of desired thrust. The thrust generated is dependent onthe magnitude of the joystick lever movement (direction 90°- thrust to port,see Figure 3-2). In order to develop a pure translational force (no rotation)each water jet is placed in its optimum position (determined during calibra-tion) and operated to achieve the desired transverse motion. Changes inmagnitude and direction are controlled by varying the bucket position andengine RPM of each water jet.

To compensate for alongship forces/movements imposed by outsideforces such as wind and currents, the joystick can be moved slightly inthe direction opposite of the disturbance. Accordingly, any unwantedrotational disturbances can be compensated for by rotating the steeringwheel.

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Figure 3-2. Docking mode — Thrust to port

Rotation

In all conditions, rotation is controlled through movement of the helm.Whether thrusting ahead, astern or transversely, adding or subtractingsmall amounts of steering nozzle motion will superimpose a small turningmoment. The additional nozzle displacement is increased as the requiredmoment increases. Pure rotation is obtained by maintaining the reversingbuckets at the neutral position and turning the nozzles. In both Transit andDocking Modes, this is accomplished by movement of the tiller with thejoystick at its neutral thrust position. Small tiller adjustments will translateto small heading changes, and large adjustments will translate to largeheading changes.


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Single water jet Twin water jet

Steering wheelturned to port

Steering wheelstraight

Steering wheelturned to port

Steering wheelstraight

Full ahead

Zero thrust

Port thrust

Full astern

Figure 3-3. Single and twin jet maneuvers

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Braking

Braking is very different from braking with a propeller boat. Using the re-versing bucket, which can be manoeuvred from full ahead to full asternin 3 seconds, it is possible to apply astern thrust at the beginning of thebreaking sequence while the boat still is travelling ahead. This will give ashorter braking distance, but also very high breaking force which has to beconsidered in order to avoid personal injury and material damage. Emer-gency braking should therefore only be used when necessary.

Emergency braking

1. Set the lever to full astern.

2. Maintain full astern position until the boat has slowed down (almoststopped).

3. Gradually decrease the thrust, so that zero thrust is ordered when theboat has stopped.

While braking, the steering characteristics of the boat is changed and theboat becomes much more sensitive to steering wheel movements. There-fore it is not recommended to steer the boat except for keeping the course.

Warning!The forces involved in emergency braking can cause personal injury andmaterial damage.

When emergency braking is not necessary a regular stopping of the boatshould be performed.

Slowing down and stopping

1. Gradually decrease the RPM until the boat has slowed down.

2. When the boat has reached low speed, set the levers in zero thrustposition.

3. If necessary, order a little astern thrust until the boat has stopped.


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Control station transfer

Transferring control from one operating station to another is achieved byactuating the indicating push button on the station taking control. As asafety measure, an interlock prevents the system from transferring fromone station to another unless both of following conditions are satisfied:1.) the position of the joystick and/or control levers (depending on theconfiguration) at each station are matched and, 2) the position of the helms(including the Z-axis of the joystick) are matched.

The following procedure must be carried out when transferring the stationcontrol:

1. Place both the control levers and joystick in their center detent posi-tions.

2. Quickly press the indicating push button twice at the station takingcontrol.

3. Rotate the steering wheel/Z-axis of the joystick through its range ofoperation to match the positions of the two stations.

4. Once the steering wheel and Z-axis of the joystick are aligned andwithin 10% of each other, the transfer takes place immediately, andthe LED provides the appropriate status as listed in the table below.

Table 3-1. Transfer button LED status

Transfer button LEDstatus

Indication

Not illuminated Station not in controlFlashing quickly (0.5second intervals)

Control transfer pending

Illuminated steady Station in control

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Using the control devices

Clutch control

Figure 3-4. Clutch panel

The clutch panel handles the ENGAGE, DISENGAGE, and BACKFLUSH(reverse) functions of the clutch. All three states aremutually exclusive andare controlled with two three-position momentary rocker switches per en-gine. When the ENGAGE button is pressed, it energizes a latching circuitwhich keeps the clutch engaged until the DISENGAGE button is pressed.The following safety interlocks are integrated into the clutch panel circuit:

1. Neutral start interlock – If the respective gear is engaged, the clutchpanel provides an interlock to inhibit the engine from starting.

2. Engine at idle interlock – If provided by the engine manufacturer, an“engine at idle” input is used to inhibit the gear from engaging if theengine is not at idle.

The backflush circuit is not provided with latching logic, thus the backflush(reverse) gear remains engaged only while the button remains depressed.The backflush gear is not provided with a neutral thrust permissive, how-ever, it will not engage while the forward gear is engaged for safety rea-sons.

The clutch panel is equipped with an idle knob to control RPM independentof the joystick. Rotation of the idle knob clockwise increases RPM, whilerotation counter-clockwise decreases RPM. The RPM range of the idleknob is typically limited to 40% of full RPM, but is adjustable via the controlsystem software during system commissioning.

LEDs are provided on the switches to indicate the status of each clutch(see Table 3-2 below). To decrease the brightness of the LEDs, pressdown the lower portion of the rocker switch labeled DIM. To increase thebrightness of the LEDs, press down the lower portion of the rocker switch


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labeled BRIGHT. Press the applicable button repeatedly until desired LEDintensity is achieved. This dimming circuit is common for the panel, soincreasing or decreasing the LED brightness with these switches affect allfour LEDs.

Table 3-2. Clutch LED status

LED Status IndicationNot illuminated Clutch not engagedIlluminated steady Clutch engaged

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LCD display and alarm panel

Figure 3-5. – LCD display and alarm panel

Panel operation

The LCD display serves two primary functions; to display the position of thereversing buckets, steering nozzles, and interceptors/trim tabs as applica-ble for a given application and also to provide a means for the operatorview control system alarms. Additionally, it serves as means to performthe control system calibration functions.

To change the screen display at any time, press any one of the first fourbuttons (beginning on the left) on the display. This action will display thebutton function menus on the bottom of the LCD display. Once the desiredmenu button is pressed, the screen will change accordingly.

To change the LCD backlight and/or contrast at any time, press the fifth(5th) button (furthest to the right). This will display the function menusfor increasing/decreasing the screen contrast and the backlight intensity.Once this submenu open, pressing the buttons under the respective “+/-“icons will cause the screen display to change accordingly.

Steering nozzle, reversing bucket, and interceptor display

The LCD display panel continuously indicates the actual position of thesteering nozzles, reversing buckets and interceptors (or trim tabs) posi-tions as applicable. The positions are shown via bar graph displays.

• When the reversing buckets are in the neutral thrust position, only thecenter bar is darkened on the respective graph. When the reversingbuckets are moved in either the up or down direction, the display in-crementally darkens additional bars to reflect the actual position of thebucket.


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• When the steering nozzles are in the center position, only the centerbar is darkened on the respective graph. When the steering nozzlesare moved in either the port or stbd direction, the display incrementallydarkens additional bars to reflect the actual position of the nozzles.

• When the interceptors are in the fully raised position, only the topbar is darkened on the respective graph. When the interceptors arelowered, the display incrementally darkens additional bars to reflectthe actual position of the unit. When the interceptors are fully lowered,the bar graph display is fully darkened.

LCD display data modes

The LCD display is capable of receiving data from two separate sourcesand is capable of displaying the positions of the steering nozzles and re-versing buckets from either source for purposes of redundancy. (Note: notapplicable for most applications).

The two sources of data for the LCD display are:

• Indication Module (dwg.100506-364) – Provides interface to thereversing bucket steering nozzle, and interceptor potentiometers,converts the analog input signals to digital format and provides aCAN/J1939 data output to the LCD displays.

In the event of a cable failure or an indication module failure, a warningicon displaying !J1939 appears on the LCD display. If the LCD data modeis configured for CAN at the time this fault is generated, change the datamode to 232 until the source of the fault is identified and corrected.

NOTE!For applications that are not supplied with an indication module and dedi-cated indication circuit, the LCD should not be configured for CAN mode.

• Control box – Provides an RS232 serial output to the LCD displayscontaining data for the position of the reversing buckets and steeringnozzles as well as any control system faults.

In the event of a cable failure or control box microprocessor failure, a warn-ing icon displaying Serial appears on the LCD display. If the LCD datamode is configured for 232 at the time this fault is generated, change thedata mode to CAN until the source of the fault is identified and corrected.While the Serial/RS232 fault exists, communication between the LCD dis-play and the control box ceases, thus the LCD does not display any controlsystem alarms.

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LCD display menu buttons

As mentioned above, pressing any one of the first four buttons will displaythe button function menus on the bottom of the LCD. Once a menu buttonis pressed, the LCD screen changes accordingly. Pressing the fifth (5th)button displays the function menus for increasing/decreasing the screencontrast and the backlight intensity. Once this submenu opens, pressingthe buttons under the respective “+/-“ icons causes the screen display tochange accordingly.

Screendisplay Button Function

Main screen 1, 2, 3and 4

Displays the button function menus onthe bottom of the LCD.

Main screen 5Backlight/contrast adjustment - Pressing the

buttons under the respective “+/-“ icons causesthe screen display to change accordingly.

Main screen 1Alarm acknowledge: Pressing the buttonminimizes the size of the “FAULT” icon on

the main display screen.

Main screen 2 Fault screen – Display text readout ofactive control system faults

Main screen 3* Calib (calibration) screen – Enters thecalibration submenu screen.

Main screen 4*† System screenMain screen 5 Exit/hide submenuFault screen 1 Viewmeters – Returns to the main display screen.Fault screen 5 Exit/hide submenu.Main screen→ Calibscreen

1 Viewmeters – Returns to the main display screen.

Main screen→ Calibscreen

2

CAN Calib - Enters the CAN calibrationsubmenu screen.

Applicable only for applications that aresupplied with an indication module and

dedicated indication circuit.


3

Thrust Calib - Enter the thrust calibrationsubmenu screen. Used for setting the neutralthrust position of the reversing buckets (see

Control system calibration).Main screen→ Calibscreen

4INIT CAL - Enters the control box into itsautomatic calibration mode (see Control

system calibration).


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5 Exit/hide submenu


→ CAN calibscreen



→ CAN calibscreen

2 System calib – Return to calib screen.


→ CAN calibscreen

3 Not used.


→ CAN calibscreen

4

Init Cal – Initializes calibration modefor the LCD display and enters into the

corresponding submenu.Applicable only for applications that aresupplied with an indication module and

dedicated indication circuitMain screen→ Calibscreen

→ CAN calibscreen

5 Exit/hide submenu


→ CAN calibscreen

→ INIT CALscreen (CAN

calib)

1Finish Cal – Once the calibration procedure hasbeen completed, pressing this button stores

the values in a non-volatile memory.


→ CAN calibscreen


calib)

2Set Z Thr – Records the zero (neutral)thrust position of the reversing buckets to

properly scale the display.

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→ CAN calibscreen


calib)

3 Not used.


→ CAN calibscreen


calib)

4 Abort Cal – Exits out of the calibration modewithout changing any of the calibrated values.


→ CAN calibscreen


calib)

5 Exit/hide submenu.


→ Thrust calibscreen




2 System Calib - Return to calib screen



3INIT ZTHRST - Enter into zero thrust calibrationand its corresponding submenu. This operation

is also commonly referred to as Set1.



4INIT TRANSV - Enter into tranverse thrust

calibration and the corresponding submenu. Thisoperation is also commonly referred to as Set2.


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→ Thrust calibscreen→ INITZTHRSTscreen

1 Set ZTHRST - Saves the new zero (neutral)thrust position of the reversing buckets.



2 Finish CALIB - Deactivate the calibration modeand return to the CALIB screen.



3 Not used.



4 Not used.




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→ Thrust calibscreen→ INITTRANSVscreen

1 Set TRANSV - Saves the new nozzle positionsin order to achieve transverse motion.



2 Finish CALIB - Deactivate the calibration modeand return to the CALIB screen.



3 Not used.



4 Not used.






→ INIT CALscreen

1Finish CALIB - Save new calibration values,deactivate calibration mode, and return

to the CALIB screen.


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→ INIT CALscreen

2Abort CAL – Exits out of the calibration modewithout changing any of the calibrated values.

Return to the CALIB screen.



→ INIT CALscreen

3 Not used.



→ INIT CALscreen

4 Not used.



→ INIT CALscreen


Systemscreen 1 Viewmeters – Returns to the main display screen.

Systemscreen 2 Arrow up - Scroll up through parameters.

Systemscreen 3 Arrow down - Scroll down through parameters.

Systemscreen 4 Toggle - Toggle the current selected

parameters values.Systemscreen 5 Exit/hide submenu.

Systemscreen →IntSteer

N/AValue = ON or OFF. Enables or disablesthe integrated interceptor steering function

of the control system.

Systemscreen →DatMode**

N/A

Value = CAN or 232. Changes the data sourcefor displaying the position of the nozzles, bucketsand interceptors. Note: CAN is a valid mode only

when an indication module is supplied.

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Systemscreen → 232

Xmit**N/A

Value = ON or OFF enables or disablesthe integrated interceptor steering function

of the control system.

Systemscreen →NozMap**

N/A

Value = NORM or FLIP enables the directionof the nozzle display to be changed toproperly correlate to the direction of the

steering nozzle movement.

Systemscreen →BktMap**

N/A


reversing bucket movement.

Systemscreen →IntMap**

N/A


interceptor movement.Systemscreen →StaType**

N/AValue = Main or Wing enables the operatingmode of the LCD to be changed betweenprimary (Main) and secondary (Wing).

Boot loader– To be

accessed byauthorizedRolls-Roycepersonnel

only

1 and2

A. Simultaneously holding down buttons 1and 2 while the unit is being powered up

calls up the loader screen.B. Simultaneously holding down buttons 1and 2 for approx 2 seconds when the unitis running displays the message “Hold to

reboot”. If the buttons remain depressed foran additional 2-3 seconds after this message

appears, the loader screen is called up.

* When entering the calib screen and the system screen the user isprompted for a password. This password is “1123” and the numbersare clearly marked on the LCD. This is necessary because the functionsunder these screens should not be touched during normal operation ofthe craft. It is imperative that these screens are not entered accidentallyand altered unknowingly, hence the password.

**These values should not be changed once they have been set by anauthorized Rolls-Royce service representative.

† Under the system screen the DatMode can be toggled between “CAN”and “232”. In “232” mode, the LCD displays the position of the noz-zles/buckets/interceptors based on data received from the control box. In“CAN” mode, the LCD displays the position of the nozzles/buckets/inter-ceptors based on data received from separate potentiometers dedicatedfor the indication circuit (Note: not supplied with most applications).


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LCD fault displays

When a control system fault occurs (feedback fault, non follow-up alarm,etc.), a warning icon displaying the word “FAULT” flashes on the maindisplay screen to alert the operator that a fault condition exists. Pressingany one of the first four buttons on the display displays the button functionmenu on the bottom of the LCD display. The operator may choose one ofthe following options for alarm handling:

• Acknowledge (“Ack”) alarm – When this option is selected the faulticon stops flashing, diminishes in size, and remains in the center ofthe main display sceen.

• View faults – When this option is selected, the display changes to the“FAULTS” screen. The faults screen provides a real time text displayup to 20 active alarms.

NOTE!There is no audible alarm output from this display and alarm panel. Ifsounding an audible alarm for control system faults is required for theapplication, it is necessary to interface an external alarm system to thealarm output on the control box (see Installation Manual, Alarm Interface).

A complete list of control system alarms is provided in the following table.Note that not all alarms apply to every application; only alarms applicableto the control system configuration are active.

Alarm Cause

!FAULTCommon alarm for control system faults; see tablebelow for specific alarms that may appear on the“Fault” screen.

!J1939 Indicates a fault condition with the CAN network orindication module.

!Serial

Indicates that the serial communication link betweenthe LCD display and the control box has failed,possibly the result of a cable failure or control systemmicroprocessor failure.

CAL FAULT Faulty control system calibrationRoll Cmd Pot Roll command potentiometer signal failureTrim Cmd Pot Trim command potentiometer signal failure

ST1 Joy X Station #1 Joystick X-axis (port/stb) commandpotentiometer signal failure

St1 Joy Y Station #1 Joystick Y-axis (fore/aft) commandpotentiometer signal failure

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ST1 Port Lever Station #1 Port control lever command potentiometersignal failure

ST1 Stbd Lever Station #1 Stbd control lever command potentiometersignal failure

ST1 Helm/Till Station #1 Helm/tiller command potentiometer signalfailure

ST1 Idle Knb Station #1 Idle knob command potentiometer signalfailure

ST2 Joy X Station #2 Joystick X-axis (port/stbd) commandpotentiometer signal failure

ST2 Joy Y Station #2 Joystick Y-axis (fore/aft) commandpotentiometer signal failure

ST2 Port Lev Station #2 Port control lever command potentiometersignal failure

ST2 Stbd Lev Station #2 Stbd control lever command potentiometersignal failure


ST2 Idle Knb Station #2 Idle knob command potentiometer signalfailure

ST3 Joy X Station #3 Joystick X-axis (port/stbd) commandpotentiometer signal failure

ST3 Joy Y Station #3 Joystick Y-axis (fore/aft) commandpotentiometer signal failure

ST3 Port Lev Station #3 Port control lever command potentiometersignal failure

ST3 Stbd Lev Station #3 Stbd control lever command potentiometersignal failure


ST3 Idle Knob Station #3 Idle knob command potentiometer signalfailure

Port Bkt Sens. Port bucket feedback potentiometer signal failureStbd Bkt Sens. Stbd bucket feedback potentiometer signal failure

Port Noz Sens. Port steering nozzle feedback potentiometer signalfailure

Stbd Noz Sens. Stbd steering nozzle feedback potentiometer signalfailure

Port Tab Sens. Port interceptor/trim tab feedback potentiometer signalfailure

Stbd Tab Sens. Stbd interceptor/trim tab feedback potentiometersignal failure


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Port Bkt NFU Port bucket non follow-up fault; hydraulic system notresponding properly to control system commands

Stbd Bkt NFU Stbd bucket non follow-up fault; hydraulic system notresponding properly to control system commands

Port Noz NFU Port nozzle non follow-up fault; hydraulic system notresponding properly to control system commands

Stbd Noz NFU Stbd nozzle non follow-up fault; hydraulic system notresponding properly to control system commands

Port Tab NFUPort interceptor/trim tab non follow-up fault; hydraulicsystem not responding properly to control systemcommands

Stbd Tab NFUStbd interceptor/trim tab non follow-up fault; hydraulicsystem not responding properly to control systemcommands

DOCKMODEFAULT – InbdCltch Eng.

Dock mode fault; one or both of the inboard clutchesare engaged

DOCKMODEFAULT – OtbdCltch Dis.

Dock mode fault; one or both of the outboard clutchesare disengaged

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Waterjet backup system

As an optional compliment to the automatic controls, the backup systemenables control of the steering nozzles and reversing buckets in the eventof a failure in the automatic control system. The backup system is electri-cally isolated from the main system and is powered from a separate powersupply (if available).

Figure 3-6. Backup panel.

The backup system is of “non-follow up” type and controls the reversingbuckets and the steering nozzles by direct activation of the hydraulic con-trol valve. To enter the backup mode, actuate the two-position rockerswitch to the “backup” position. Once in backup mode, the bucket andnozzle of the given water jet unit is isolated from the automatic system andis no longer influenced by either the joystick/levers or helm/tiller. Each wa-ter jet is controlled by a two-axes jog switch.

Waterjet backup control

Each water jet is controlled by the jog lever as follows:

• Left/right movements of the switch correspond to port/stbd movementof the steering nozzles.

• Up/down motion of the switch corresponds to the up/down movementof the reversing buckets.

NOTE!In this mode, the hydraulic control valve will actuate the respectivebucket/nozzle cylinders continuously when the jog switch is in the activeposition. Although not necessary, it is helpful to monitor the displaypanel while operating the craft in backup control.


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Engine backup system

As a compliment to the automatic controls, an engine control backup sys-tem enables control of the engines in the event of a failure in the automaticcontrol system. The backup system is electrically isolated from the mainsystem and is powered from a separate power supply.

Figure 3-7. Engine backup panel.

To enter the backup mode, actuate the two-position rocker switch to the“Backup” position. Once in backupmode, the RPM control for the given en-gine/engines is isolated from the automatic control system and is no longerinfluenced by either the joystick or control levers. In backup, the engineRPM is modulated by a rotary knob on the panel. Engine RPM is propor-tional to knob rotation, and the full range of operation can be achieved.In this mode, the engine speed signal goes directly to the engine actuatoramplifier.

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Mechanical back-up

An additional level of redundancy is inherent in the hydraulic system de-sign. It is possible to move the buckets up or down or the steering nozzlesside to side with no electricity. This can be accomplished by pushing thesolenoid armature of the proportional valve with a pointy object such as aPhillips head screwdriver.

Figure 3-8. Proportional valve.


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3.2 Operating in shallow waterAvoid driving at high engine speed in shallow waters especially when re-versing since the jet of water will move up sand etc. from the bottom,therefore sand and stones can be sucked through the water jet unit. Thismay cause wear to the impeller and guide vane chamber.

Do not accelerate heavily in shallow waters. Stones and sand etc. may besucked into the water jet unit and cause wear to the impeller and the guidevane chamber.

Drive at idling speed until deeper water is reached. If a foreign object issucked into the inlet duct temporarily disengage the water jet unit to removethe object.

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Checklist if you run aground

Warning!Remove the start key and shut off the power using the main switch to makeit impossible to start the engine.

Checklist:

• Check that there are no water leaks.

• Check if there are any scrap, stones, seaweed etc. in the water jetunit by opening the inspection hatch. If necessary the anode hatchmay be opened too.

Warning!Never open the anode hatch before checking that the water levelis lower than the hatch openings. The boat may sink if water canenter the boat through the opening. Never leave an opened hatchunattended.

When starting the engine again:

• Engage the gear and check that there are no abnormal vibrations inthe shaft and hull.

• Move the steering nozzle from side to side between the limit positions.Check for abnormal noises from the steering gear.

• Move the reversing bucket up and down. Check for abnormal noises.

Caution!If there is abnormal vibrations or noises or if the boat has poor performancecompared to the performance before the accident, contact a Rolls-Royceworkshop. The Rolls-Royce workshop will do an accurate investigation ofthe inlet duct, shaft system, steering components and reversing compo-nents.


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3.3 Operating through flotsam and seaweedScrap, twigs, seaweed etc. will not usually block or damage the water jetunit. However, avoid operating over such objects because they affect theperformance of the water jet unit.

It is usually possible to notice when the water jet unit is blocked because:

• engine speed increases,

• the speed of the boat decreases,

• abnormal sound and vibrations can be heard from the water jet unit.

Caution!If fishing nets or lines are sucked into the water jet unit, the water jet unitmust be disengaged as quickly as possible to avoid damage to the impellerand impeller housing!

Removing an obstruction of the water jet unit

If a blockage of the water jet unit occurs, reduce the engine speed to idlingspeed or disengage it. The blockagemay clear when the boat goes forwardand water flows through the water jet unit.

If this is not successful:

1. Set the unblocked water jet unit to reverse. The blocked water jet unit,which must be in the ahead position and disengaged, will be flushedby the flow of water through it.

Warning!Step 2 below is not allowed if the hydraulic pump is mounted onthe water jet unit. The hydrulic pump will be damaged if the gearis reversed.

2. If step 1 was not successful, backflush the water jet unit by reversingimpeller rotation. Use low engine speed.

If step 2 above was not successful, the next step is to open the inspectionhatch. Before the inspection hatch is opened:

1. Switch of the engines.

Warning!Remove the start key and shut off the power using the main switchto make it impossible to start the engine!

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2. Check that the water level is not above the inspection hatch. If thewater level is too high, weight can be added to the bow so that thestern rises sufficiently for the inspection hatch to be opened.

Warning!Never open the anode hatch before checking that the water levelis lower than the hatch openings. The boat may sink if water canenter the boat through the opening. Never leave an opened hatchunattended.

3. If the above steps have not removed the blockage, let a diver removethe scrap from the inlet duct or contact a Rolls-Royce workshop.

3.4 Operating in heavy seasWhen operating in heavy seas note that engine speed may vary as the im-peller sucks in air. When the impeller sucks in air, drive and manoeuvringforce are reduced. Engine speed should be reduced until engine speedand drive force are stable.


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3.5 Emergency operation

Warning!Be prepared by familiarising yourself with the emergency procedures. Fail-ure to follow these procedures in emergency situations may result in per-sonal injury and equipment damage.

Operating in the event of electrical failure

If an electrical failure in the main control system should occur and cannotbe repaired, the boat can be operated by the hydraulic control valves ofthe hydraulic power pack.

Manual control of the hydraulic control valves

If the back-up system is not installed, the hydraulic control valves can beoperated manually.

NOTE!Refer to the enclosed “Hydraulic power pack assembly drawing” for moreinformation about the following control valves.

To steer the boat:

1. Push the solenoid armature of the steering valve with a pointy object.

To slow down or to speed up the boat:

1. Push the solenoid armature of the reversing valve with a pointy object.

Note that there are two reversing valves, if activating just one of them theboat will turn.

Warning!Operating the boat by manually actuating the hydraulic control valves mustbe limited to emergency operation to the nearest harbour.

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Operating in the event of a hydraulic fault

No hydraulic pressure or no hydraulic oil

If there is no hydraulic oil available due to leakage or for some other reason,the water jet unit is out of control. Tow the boat to the nearest harbourfor service. If the engines are not stopped the hydraulic pumps must bedisconnected.

Warning!If the hydraulic pump is allowed to rotate without being supplied with oil itmay run hot and cause a fire in the engine room.

1. Disconnect the hydraulic pump.

On installations where the hydraulic pump is located on the engineand is not belt driven, the cover was removed when the hydraulicpump was installed. This cover must be kept on board. The boatoperator must know where the cover was taken from and where it isstored.

NOTE!Follow the instructions how to disconnect the hydraulic pump given bythe engine manufacturer.

Reversing bucket uncontrollable

If the reversing bucket is uncontrollable but the boat is still steerable, youmay operate the boat to the nearest harbour with the reversing bucket tiedup.

How to tie up the reversing bucket:

1. Remove the screws retaining the reversing rods in the reversingbucket. Tie up the reversing bucket. When tied up it should be inahead position and should not obstruct the jet of water, see Figure3-9.

2. Operate the boat at reduced speed to the nearest harbour. Use thethrottle lever to increase/reduce thrust.

Warning!The only way to slow down (brake) the boat is to reduce the thrustor to disengage the gear. Therefore is the braking capability poor.

3. Use the reversing bucket in working order (if any) to slow down theboat. Observe that the braking capability is reduced.

4. Let a Rolls-Royce workshop investigate and repair the fault.


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Figure 3-9. The reversing bucket tied up.

Steering control lost

Emergency steps:

1. If one of the water jet unit is in working order, disconnect the faultywater jet unit in the control panel (if not already disconnected). Oper-ate the boat with the other water jet unit to the nearest harbour. Let aRolls-Royce workshop investigate and repair the fault.

2. If both water jet units are out of control, call for help and tow the boatto the nearest harbour. Let a Rolls-Royce workshop investigate andrepair the fault.

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3.6 Control system calibration with LCD displayCalibration of the control system is necessary only at initial start up and ifcomponents in the system are replaced.

Initial calibration

NOTE!Prior to performing calibration, ensure that the hydraulic system is run-ning, and that the cylinders are free and clear to move for safety of per-sonnel and equipment.

NOTE!It is necessary to disconnect any cabling between the control box and aninterface terminal (PC/handheld unit) before performing the initial calibra-tion.

1. Place the joystick and levers in their center detent positions and lockthe joystick in transit mode.

2. Click any one of the first four buttons on the display to call up thefunction menus on the bottom of the LCD.

3. Select the CALIB SCREEN button to enter the control system calibra-tion submenu.

a. Enter password (1–1–2–3) when prompted.

4. Select the INIT CAL button to initialize the calibration.

a. The screen displays Autocal status: Active and also:1. Cylinders moving up/stbd, followed by2. Cylinder moving down/port

5. When the display shows Autocal Status: Active, Cycle controls, un-lock the joystick andmove the following station 1 and station 2 compo-nents (as applicable) across their respective entire ranges of motion:1) helm/tiller 2) joystick (full range of both X and Y axes) 3) controllevers, 4) trim and roll knobs and 5) idle knob.

NOTE!The sequence of component operation is arbitrary.

NOTE!Do not attempt to transfer station control during the calibrationprocess for station #2.

6. Place the joystick back in their center detent positions.


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7. Once the above procedures have been completed, press the FINISHCALIB button.

a. The screen displays Autocal status: Not active.

8. The calibration is complete. Click VIEWMETERS to return to the maindisplay screen.

Neutral bucket calibration

Caution!Prior to performing the following calibration procedure, ensure that the en-gine clutches are engaged.


2. Click the CALIB SCREEN button to enter the control system calibra-tion submenu.

a. Enter password (1-1-2-3) when prompted.b. The screen displays Autocal status: Not active.

3. Click the THRUST CALIB button to enter the neutral thrust and sidethrust calibration submenu.a. The screen displays Thrust calib status: Not active.

4. Click the INIT Z THRUST button to enter the neutral thrust submenu.

5. Using joystick or levers (as applicable), adjust the bucket position forneutral thrust (no net ahead or astern thrust is being imparted to thevessel).a. The screen displays Thrust Calib Status: Active – Set NeutralThrust Position.

6. Select the SET Z THRUST to set the neutral thrust position and imme-diately move the joystick (or levers) back to the center detent position.

7. Repeat steps 5 and 6 if necessary.

8. Click the FINISH CALIB button to exit the neutral thrust submenu.

NOTE!If FINISH CALIB is not shown as an option, click the EXIT button(5th / furthest button to the right), and then press any one of thefirst four buttons.

9. Click VIEW METERS to return to the main display screen.

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Side thrust calibration

NOTE!For best results, perform the following procedure in an area that permitssafe maneuvering and where there is minimal wind and current distur-bance to the craft.


2. Click the CALIB SCREEN button to enter the control system calibra-tion submenu.

a. Enter password (1-1-2-3) when prompted.b. The screen displays Autocal status: Not active.

3. Click the THRUST CALIB button to enter the neutral thrust and sidethrust calibration submenu.a. The screen displays Autocal status: Not active.

4. Click the INIT TRANSV THRUST button to enter the side thrust sub-menu.a. The screen displays Thrust Calib Status: Active – Set TransverseThrust Offset.

5. Slowly move the joystick toward full port.

6. Adjust the helm to eliminate rotational forces.

7. Select the SET TRANSV THRUST to set the TRANSVERSE thrustposition.

8. Slowly move the joystick toward full stbd.

9. Adjust the helm to eliminate rotational forces.

10. Select the SET TRANSV THRUST to set the TRANSVERSE thrustposition.

11. Click the FINISH CALIB button to exit the transverse thrust submenu.

12. Click VIEW METERS to return to the main display screen.


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FF410Instruction manualKamewa water jets Starting and stopping

4. Starting and stopping

4.1 Before starting

Water jet unit

Check the following before the water jet unit is started:

1. Check that there is no oil or water leakage.

2. Check the oil level in the bearing housing, see page 59 section “Oillevel”.

3. Check the oil level in the hydraulic oil tank of the control system.

Caution!If there is a risk of foreign objects in the inlet duct, remove the objectsbefore starting the engine or engaging the gear. When starting pay specialattention to abnormal vibrations. If there is abnormal vibrations, the reasonfor this must be investigated and remedied else the impeller and impellerhousing may be damaged.

4.2 Starting the engine and the water jet unitThe start procedure depends on whether the water jet unit is directly en-gaged to the engine or if it is engaged via a gearbox. Note that it is notpossible to move the position of the reversing bucket and the steering noz-zle if the engine is not running.

The water jet unit is directly engaged to the engine

1. Check that the engine speed control is in idling position.

2. Be prepared to adjust the reversing bucket to zero thrust position, thesteering nozzle in centre position as soon as the engine has started.

3. Start the engine.

4. Set the steering wheel in centre position and the reversing bucket con-trol to zero thrust position.

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Starting and stopping Kamewa water jets

The water jet unit is engaged to the engine via a gearbox

1. Check that the engine speed control is in idling position and that thegear is in neutral position.

2. Start the engine.

3. Set the steering wheel in the centre position and the reversing bucketcontrol to zero thrust position.

4. Engage the gear. Only ahead position is used, counter-clockwise ro-tation viewed from the stern, during normal operation.

4.3 After starting1. Check that the steering nozzle turns both starboard and port and that

the reversing bucket maneuvers correctly.


2000-10-03

FF410Instruction manualKamewa water jets Starting and stopping

4.4 Stopping the engine and water jet unit

The water jet unit is directly engaged to the engine

1. Before the engine is stopped, set the reversing bucket in “full ahead”position and turn the steering nozzle so that the piston rod is insidethe cylinder as illustrated below.

The piston rods are insidetheir respective cylinder

Figure 4-1. The water jet unit in correct position.

This must be done so that the piston rods on the reversing cylinderand the steering cylinder are inside their respective cylinders. Thisprotects the piston rods from fouling and corrosion.

Caution!If the cylinders are above the water line it is recommended that the reversingbucket is kept in reversing position because the anodes provide better anti-corrosion protection when the reversing bucket is in the water.

2. Stop the engine.

NOTE!Be aware that the boat will move as soon as the engine RPM is increasedthe next time the engine is started. This due to the positions of the re-versing bucket and steering nozzle. Be prepared to adjust the position ofthe reversing bucket and steering nozzle as soon as the engine is startedagain.


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Starting and stopping Kamewa water jets

The water jet unit is engaged to the engine via a gearbox

1. Set the steering wheel to the centre position and the reversing bucketcontrol to zero thrust position.

2. Disengage the gear.

3. Set the reversing bucket in “full ahead” position and turn the steeringnozzle so that the piston rod is inside the cylinder as illustrated inFigure 4-1.

This must be done so that the piston rods on the reversing cylinderand the steering cylinder are inside their respective cylinders. Thisprotects the piston rods from fouling and corrosion.

Caution!If the cylinders are above the water line it is recommended that the reversingbucket is kept in reversing position because the anodes provide better anti-corrosion protection when the reversing bucket is in the water.

4. Stop the engine.



2000-10-03

FF410Instruction manualKamewa water jets Maintenance instructions

5. Maintenance instructionsThe Kamewa FF-series are constructed for maximum service life and op-erational safety. Regular maintenance according to the table below main-tains these qualities and will avoid unnecessary operational difficulties.

Warning!Read through the safety instructions before beginning the maintenancework, see page 8 section “Maintenance work”.

Caution!Never attempt an operation if you are not completely confident of how todo it. Contact Rolls-Royce if necessary.

5.1 Maintenance scheduleMaintenance schedule SeeAfter the first 30 hours page 58Daily before the first start-up page 59Weekly page 60Each month page 61After 500 hours of operation page 62Yearly service (with the boat docked) page 63Painting page 65

NOTE!The warranty only applies when the instructions in chapter “Maintenanceschedule” are followed and documented in a proper way.

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Maintenance instructions Kamewa water jets

After the first 30 hours

Visual checkpoints:

1. Check the bearing housing (1) temperature - after approximately ahalf hour of operation. Stop the engine and check the temperature ofthe bearing housing. Normal temperature is approximately 20-40°Chigher than the temperature of the water.

Warning!The enginemust be stoppedwhenmeasuring the temperature. If not, thereis a risk of personal injury. Secure a warning sign on the instrument panel“Maintenance work in progress!” to avoid the engine being started.

2. Check that the bearing tensioner nut (2) is tightened.

3. Check that the stud lock nuts (3) are tightened.

4. Check the installation of hydraulic cylinders (4).

5. Check the installation of the reversing bucket (5) and steering nozzle.

6. Check the installation of the steering rod and reversing rod (6).

7. Check the installation of the feedback assemblies installed on thesteering and reversing cylinders (7).

15

3

7

2

6

4

Figure 5-1. Checkpoints after the first 30 hours of operation.


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Daily before the first start-up

Visual check

1. Check the water jet unit visually both inside and outside the boat.Check that there is no oil or water leakage.

Oil level

1. Check the oil level in the bearing housing. The oil level is checkedwith the dipstick and must be between the max. and min. markings.If a top up is required, oil is filled through the hole where the dipstickis positioned.

Figure 5-2. Checking the oil level.

2. Also check the condition of the oil. The oil must not be mixed withwater (greyish) or burned (dark).

3. Check the oil level in the hydraulic oil tank.

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Weekly

1. Check for possible water leak (a few water drops are allowed) or oilleak from the bearing housing inspection hole. If there is water leak-age the mechanical sealing in the bearing housing must be replaced.If there is oil leakage the seals in the bearing housing must be re-placed. See page 88 for instructions how to replace the seals.

Figure 5-3. The inspection hole of the bearing housing.


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Each month

1. Check the condition of the outer anodes (1). Replace the anodes ifmore than half has been worn away.

2. Check the anode under the anode hatch (2). Replace if more thanhalf has been worn away.

2

1

1

Figure 5-4. Checkpoints to be inspected monthly.

Warning!Always check that the water level is lower than the opening for the anodehatch (2). The boat may sink if water can enter the boat through the open-ing. Never leave the anode hatch open when the boat is in the water.

3. Check if the inspection hole in the bearing housing is open. Clean theinspection hole with a stiff wire if necessary.

NOTE!The consumption of the anodes may vary from case to case. The qual-ity and condition of the water and also incorrect grounding of the boat’selectrical system will affect the system.

If the anodes are being used up quickly, the inner anode in the guide vanechamber must also be checked:

1. Dock the boat.

2. Remove the guide vane chamber according to the instructions onpage 80 section “Guide vane chamber”.

3. Remove the anode from the guide vane chamber and check the con-dition. Replace the anode if more than half the anode has been wornaway.

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After 500 hours of operation

Replace the oil in the bearing housing

1. Remove the plugs (1) and drain the oil into a container.

2. Screw the plugs in to place when all the oil has drained out.

3. Fill the oil through the dipstick (2) hole.

4. Check the oil level with the dipstick (2). The oil level must be betweenthe max. and min. markings on the dipstick.

Figure 5-5. Oil dipstick and plugs of the bearing housing.

NOTE!For the recommended oil grade and the correct volume see page 117section “Recommended lubricants and sealants”.


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Yearly service (with the boat docked)

Caution!The water jet unit must not be run dry because the rubber bearing in theguide vane chamber and the mechanical sealing require water lubrication!

1. Check all bearing bushings for wear. Replace the bearing bushings ifthe play is greater than 1 mm.

2. Check the condition of the piston rods (1) on both the steering andreversing cylinders. Note a thin film of oil on the piston rod is normal.

3. Remove the reversing components, steering components and theguide vane chamber, follow the instructions starting on page 76section “Reversing rod”. Check the following:

• Measure the clearance (2) between the impeller and the impellerhousing as described on page 107 section “Checking the clearancebetween the impeller and impeller housing”.

• Check the condition of the rubber bearing. If the play between therubber bearing and the shaft sleeve (3) is not between 0.1-1.0 mmthe rubber bearing must be replaced.

• Check the guide vanes in the guide vane chamber. If theyare damaged and/or corroded contact Rolls-Royce for furtherinstructions.

4. Check the condition of the inner anodes, in the guide vane chamberand under the anode hatch (4). Replace the anodes if more than halfhave been worn away or after a maximum of two seasons.

5. Check the o-ring (5) under the inspection hatch. The o-ring must bereplaced if it does not provide a perfect seal.

2

45

1

3

5

6

Figure 5-6. Checkpoints to be inspected annually.

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6. Remove the impeller and the impeller housing as described on page82 section “Impeller”, and check the following:

• Check the impeller. If the tips of the impeller blades are lightlydamaged they can be filed off as illustrated below. If the impellerblade is deformed the impeller should be replaced.

Figure 5-7. Cross-section of the impeller blade.

• Check the impeller housing running surface. Replace the impellerhousing if there are 2 mm deep scratches or 10 mm long scratchesin the direction of the shaft.

7. Visually check the mounting of all components. Tighten as necessary.

8. Check the condition of the paint on all the water jet unit components.Clean and touch-up the paintwork as necessary.


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Painting

Anti-fouling paint

The waterjet is not anti-fouling painted at factory expect for the inside ofthe inlet pipe and the inlet grid. All painted surfaces on the outside of thewaterjet must be painted with anti-fouling before the boat is launched.

Apply the anti-fouling paint as follows:

• Clean the surfaces from grease and oil with a suitable washing deter-gent.

• Remove salt and other dirt with high pressured fresh water.

• Apply a thin layer off HEMPADUR 45182 or equal epoxy tie coatingand let it dry.

• Apply the anti-fouling paint within three (3) days after the epoxy tiecoating has been applied.

The water jet unit can be anti-fouling painted with the same type of anti-fouling paint as the boat, provided that the paint does not contain copper.If local legalization does not allow the use of anti-fouling paint, contactRolls-Royce for advice on alternative methods.

Drying times according to the paint manufacturer’s instructions.

Touching up paintwork damage

Any scratched water jet unit component must be repaired. Observe thefollowing before painting a component:

NOTE!If a corrosive damage to the inlet duct is deeper than 3 mm, contact Rolls-Royce.

1. Wash the area to be painted with fresh water.Caution!

Be careful when using pressure washers. High water pressure candamage components on the water jet unit.

2. Leave the area to dry.

3. Lightly blast the surface and level out any unevenness.

4. Paint the area as described below.

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Painting

Spray painting:

1. Spray 3 layers with “Intershield 803”.

2. Spray 1 layer with HEMPADUR 45182 or equal epoxy tie coating.

3. Spray 1 layer with anti-fouling paint.


Painting with brushes:

1. Apply 5 layers of “Intershield 803”.

2. Apply 1 layer of HEMPADUR 45182 or equal epoxy tie coating.

3. Apply 2 layers of anti-fouling paint.


Do not apply “anti-fouling paint” on cylinder rods and anodes.

Correction of damages in the painting

Should an area or a component of the water jet unit be scratched duringinstallation, the damaged painting must be remedied. Observe the follow-ing before painting a component:

1. Blast the area to be painted.

2. Wash the blasted area with fresh water.Caution!

Be careful when using pressure washers. High water pressure candamage components on the water jet unit.

3. Leave the area to dry for about 12 hours.

4. Lightly blast the surface and level out any unevenness.

5. Paint the area as described earlier.


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5.2 Laying up

With the boat in the water

If the boat is not going to be in use for a longer period the following actionsshould be taken to avoid fouling and corrosion:

Once a week

Start the engines and take the following actions.

• Clutch in the water jet and run it for a few minutes to wash out seagrowth.

• Lower and raise the reversing bucket a few times.

• Turn the steering wheel to the limit positions a number of times.

Caution!When the engine is stopped follow the stopping instructions on page 55 toavoid corrosion.

Preventing fouling

1. The water jet unit must be painted with “anti-fouling” paint of pre-scribed quality.

2. If possible, moor the boat in deep water.

3. Keep the water jet unit out of sunlight as much as possible. A tarpaulincan be used to cover the water jet unit to protect it from sunlight. Inshallow waters a similar protection should be placed over the openingfor the inlet duct.

4. If there is a risk of frost the engine compartment should be warmedsufficiently to prevent water from freezing in the inlet duct and guidevane chamber.

Before starting the water jet unit after a longer period of inactivity, checkthat no foreign objects are obstructing the moving components or blockingthe inlet duct.

Caution!In regions where it is a risk of frost, the boat should be lifted onto dry land.Seasonal storage of the water jet unit is recommended to avoid that theinlet duct does not crack as a result of freezing.

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Boat docked

NOTE!To avoid fouling and corrosion the mechanical seal should be flushed withfresh water every time the boat is docked.

Seasonal storage

Carry out the following after the boat has been taken on to dry land:

1. Clean the water jet unit with fresh water.Caution!Do not use pressure washers. High water pressure can damage compo-nents on the water jet unit.

2. Touch up any damage to the paintwork, as described on page 65 sec-tion “Touching up paintwork damage”.

3. Replace the oil in the bearing housing, as described on page 62 sec-tion “After 500 hours of operation”.

4. Grease all zinc coated components, for example hydraulic connec-tions, zinc coated screws etc.

5. Wipe up all the water in the guide vane chamber.

Caution!If the water in the guide vane chamber is not dried off there is a risk of theguide vane chamber cracking due to freezing.


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5.3 Fault-tracingA number of symptoms and possible causes of operational problems aredescribed in the table below. In the event of faults or errors that you cannotremedy yourself you should always contact Rolls-Royce.

Warning!Read through the safety instructions before beginning the maintenancework, see page 8.

Symptom Possible causeSteering does not function correctly 1,2,3The boat does not reverse 1,4,5,6Poor performance 6,7,8,9,10,11,12,13Abnormal noise from the impeller housing 9,12,14,15Abnormal vibrations 9,10,12,16,17Abnormal noise from the bearing house 11,18,19Bearing housing leaking oil or water 19,20The axial bearing is hot 11,18,21The shaft nut/bearing tensioner nut hasloosened

11,16,17,22

1. Hydraulic fault 12. Partially defective impeller2. The installation of the steering

components13. The clearance between the

impeller and the impeller housingis too great

3. The function of the steeringwheel

14. Defective impeller housing

4. Obstruction in the reversingbucket

15. Sand in the water jet unit afteroperating in shallow waters

5. The installation of the reversingbucket components

16. Shaft damaged due to runningaground

6. The reversing rod setting 17. Intermediate shaft not balanced7. Engine fault 18. Oil level too low in bearing

housing8. Control setting 19. Defective mechanical sealing9. Foreign objects in the impeller

housing or in the guide vanechamber

20. Defective seals in bearinghousing

10. Foreign objects in the inlet duct 21. Water in the oil11. Bearing fault 22. Defective locking washer/locking

screws or shaft nut/bearingtensioner nut not sufficientlytightened

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2007-09-17

FF410Instruction manualKamewa water jets Removing and installing

6. Removing and installing

6.1 GeneralThe instruction for removal describe how to correctly remove the waterjet unit component by component. Depending on circumstances, severalcomponents can be removed from the water jet unit at the same time, aslong as the instructions are followed.

The water jet unit must be completely out of the water and dry prior to re-moval. All components should be inspected as they are removed. If anycomponent is worn or damaged a spare part must be ordered. Compo-nents can be ordered as described in chapter “Spare Parts” or by contact-ing Rolls Royce.

Installation is carried out in reverse order to removal. Before starting toinstall, check that all new components are available.

Caution!Use only components manufactured or approved by Rolls-Royce. Notethat components that appear identical to approved components may notfulfil the requirements.Ensure clean conditions and take greate care when installing.

There are critical joints which must be tightened using a torque wrench.The tightening torques are listed on page 118 section “Tightening torques”.

Component Removal InstallationShaft flange page 74 page 115Reversing rod page 76 page 113Reversing bucket page 77 page 112Steering rod page 78 page 110Steering nozzle page 79 page 110Guide vane chamber page 80 page 105Impeller page 82 page 103Impeller housing page 85 page 102Hydraulic cylinders andthrough rod arrangement

page 86 page 100

Components of the inlet duct page 87 page 98Bearing housing and shaft page 88 page 91

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Removing and installing Kamewa water jets

6.2 Tools for removal and installationGeneral toolsType Size QtyBox wrench 36 mm 1Socket wrench 30 mm 1Socket wrench 24 mm 2Socket wrench 19 mm 2Socket wrench 17 mm 2Socket wrench 13 mm 1Socket wrench 10 mm 1Allen key 6 mm 1Allen key 5 mm 1Allen key 4 mm 1Screw driver 1Adjustable wrench 2Hammer 1Plastic mallet 1Rubber mallet 1Ø8.5 mm drill & Tap M10 1Feeler gauge 1Torque wrench 124 mm box wrench for torque wrench 1


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Special toolsPos Type Qty1 Puller for the shaft flange / impeller 12 Wrench for the bearing tensioner nut 13 Socket for the flange nut 14 Wrench for the impeller nut 15 Special tool for installing the seals of the

bearing housing1

Figure 6-1. Special tools to be used when removing and installing components.

NOTE!Special tools 1-4 are delivered with the water jet unit.

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6.3 Removal instructions

NOTE!If the reason for removal is only to check or remove the impeller, beginby removing the reversing rod as described on page 76.

Shaft flange

1. Disconnect the intermediate shaft by unscrewing the screws retainingthe intermediate shaft in the water jet unit flange.

2. Fold back the locking tabs on the locking washer and slacken off theflange nut.

3. Secure the puller in the shaft flange.

4. Tap the puller a couple of times with a hammer. If the shaft flange doesnot release, tighten the puller further and tap it a few more times.

Tighten the puller

Tap with a hammer sothat the shaft flange loosens

Figure 6-2. Removing the shaft flange.Caution!

Use the flange nut as a stop. This prevents the shaft flange and pullerfrom falling off the shaft when the shaft flange loosens!


2000-12-02


5. When the shaft flange has loosened, unscrew the puller and the flangenut. Pull off the locking washer and the shaft flange.

Figure 6-3. Components to be removed.

Tools:

• Socket for flange nut

• Screw driver

• Puller

• Hammer

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Reversing rod

1. Remove the screw retaining the reversing rod in the reversing bucket.If necessary, also remove the reversing rod from the reversing cylin-der.

2. Check the bearing bushings. If there is more than 1 mm play, thebearing bushings must be replaced.

3. Check the anode. Replace if less than half the anode remains.

Figure 6-4. Removing the reversing rod.

Tools:

• 2x19 mm socket wrench


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Reversing bucket

1. Fold down the locking tabs. Slacken off the screws securing the re-versing bucket in the guide vane chamber.

2. Pull out the distance sleeves.Caution!Take care not to damage the bearing bushings or distance sleeves.

3. Check the bearing bushings. If there is more than 1 mm play, thebearing bushings must be replaced. If the bearing bushings are re-placed, the bearing seat must be cleaned before installation.

4. Check the anodes on the reversing bucket. Replace if less than halfan anode remains.

Figure 6-5. Removing the reversing bucket.

Tools:

• 30 mm socket wrench


• Hammer+ screw driver

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Steering rod

1. Remove the screw retaining the steering rod in the steering nozzle. Ifnecessary, also remove the steering rod from the steering cylinder.

2. Check the bearing bushings. If there is more than 1 mm play, thebearing bushings must be replaced.

Figure 6-6. Removing the steering rod.

Tools:



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Steering nozzle

1. Disconnect the connecting cable from the upper retaining screw of thesteering nozzle.

2. Fold the locking tabs back and slacken off the screws securing thesteering nozzle.

3. Pull out the distance sleeves.Caution!Take care no to damage the bearing bushings or distance sleeves.

4. Remove the steering nozzle.

5. Check the bearing bushings. If there is more than 1 mm play the bear-ing bushings must be replaced. If the bearing bushings are replaced,the bearing seat must be cleaned before installation.


Figure 6-7. Removing the steering nozzle.

Tools:



• 5 mm Allen key

• Screw driver

• Hammer

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Guide vane chamber

1. Remove the screws retaining the anodes in both the guide vane cham-ber and impeller housing. Remove the anodes.

2. Remove the screws retaining the guide vane chamber.

3. Pull the guide vane chamber from the shaft. The end of the shaft isheld in the guide vane chamber with a rubber bearing (a water lubri-cated slide bearing).

4. Check the condition of the anodes. Replace if less than half an anoderemains.

Figure 6-8. Removing the guide vane chamber.

Check the rubber bearing. If the play between the rubber bearing andthe shaft sleeve is not between 0.1-1.0 mm the rubber bearing must bereplaced.

Removing the rubber bearing:

1. Remove the anode. Replace if less than half the anode remains.

2. Remove the locking screws from the rubber bearing.

3. Tap out the end piece from the guide vane chamber.

4. Press out the rubber bearing.


2000-12-02


Figure 6-9. Removing the rubber bearing.

Caution!When pressing out the rubber bearing, the inner section of the guide vanechamber must be supported. The application force must not be taken upby the outer section of the guide-vane chamber and the guide vanes. Donot damage the mounting surface of the rubber bearing in the guide vanechamber. This may make it difficult to install the new rubber bearing.

Tools:



• 5 mm Allen key

• Hammer

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Impeller

Before removing the impeller, the clearance between the impeller and theimpeller housing must be measured. Follow the instructions on page 107and make a note of the clearance.

Removing the impeller:

1. Remove the impeller nut locking screws.

2. Unscrew the impeller nut and pull out the shaft sleeve.

Figure 6-10. Removing the shaft sleeve.

3. Secure the puller in the impeller.

4. Tap the puller a couple of times with a hammer. If the impeller doesnot release, tighten the puller further and tap it a few more times.


2000-12-02


Figure 6-11. Securing the puller.

5. When the impeller has loosened, pull it off the shaft. Slacken off thepuller.

Figure 6-12. Pulling out the impeller.

6. Remove the o-ring that is located on the shaft behind the impeller.

7. Check the impeller. If the tips of the impeller blades are lightly dam-aged they can be filed off as illustrated below. If the impeller blade isdeformed the impeller should be replaced.

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Figure 6-13. Cross section of the impeller blade.

Tools:

• 4 mm Allen key

• Special Wrench for impeller nut

• Puller + Hammer


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Impeller housing

1. Remove the screws retaining the anodes in the impeller housing andinlet duct. Remove the anodes.

2. Check the condition of the anodes. Replace if less than half an anoderemains.

3. Remove the screws retaining the impeller housing in the inlet duct.

4. Check the impeller housing surface. If there are 2 mm deep scratchesor 10 mm long scratches in the direction of the shaft, the impellerhousing must be replaced.

Figure 6-14. Removing the impeller housing.

Tools:


• 5 mm Allen key

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Hydraulic cylinders

Caution!Ensure cleanliness when removing hydraulic components.

1. Remove the hydraulic hoses. Drain the oil into a suitable container.

Warning!Take great care when removing the hydraulic hoses. The pressure maystill be high, the oil may be hot. Carelessness can result in personal injury.

2. Remove the hydraulic cylinders from the water jet unit transom.

3. Check the condition of the hydraulic cylinders. In the event of leakage,scratches on the piston rod or other damage the hydraulic cylindermust be replaced.

4. Check the seals, replace the seal if it is broken.

Figure 6-15. Removing the hydraulic cylinders.

Tools:


• Adjustable wrench


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Components of the inlet duct

Figure 6-16. Removing the hatches.

Outer inspection hatch:

1. Unscrew the eye nuts of the inspection hatch.

2. Pull up the inspection hatch with o-ring from the inlet duct.

3. The o-ring must be replaced if it does not provide a perfect seal.

If necessary, the wire and inspection hatch can be removed from the inletduct.

Inner inspection hatch:

The inner inspection hatch is not installed on this water jet.

Anode hatch:

1. Remove the screws retaining the anode hatch.


3. The o-ring must be replaced if it does not provide a perfect seal.

Tools:



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Bearing housing and shaft

General

The flange end of the shaft is held in the bearing housing (13) by an oil lu-bricated axial bearing (7). The bearing housing and bearing housing cover(3) have seals (5, 10) to keep the oil in the bearing housing. A mechanicalsealing (19) seals against water. On the underside of the bearing housingthere is an inspection hole (11). If any of the seals are leaking, oil or waterwill come through the hole.

Figure 6-17. Components of the bearing housing.


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Removal

1. Remove the oil drain plugs (12) and drain the oil into a suitable con-tainer.

2. Remove the nuts holding the bearing housing (13) in the inlet duct.

If there is sufficient space between the water jet unit and the engine,pull the entire shaft assembly into the boat. It can then be taken in-doors for further disassembly.

Caution!Take care not to damage the cone or threads of the shaft.

3. Fold back the locking tabs on the locking washer (2) and remove thebearing tensioner nut (1).

4. Remove the bearing housing cover (3). Check the seal (5). Press outthe seal of the bearing housing cover if a new one is required.

5. Pull out the support sleeve (6) from the bearing housing (13). Note thatthe bearing shell comes with the support sleeve. Slide the bearinghousing forwards and backwards so that the o-ring (8) loosens andcan be removed.

6. Pull the bearing housing (13) from the shaft.

7. Remove the screws from the mechanical sealing (19) and remove it.Check the sealing surfaces of the mechanical sealing.

8. Lift out the shaft if it has not already been removed.

9. Place the bearing housing (13) indoors. Remove the axial bearing(7) and the support sleeve (9) with bearing shell. The axial bearingmust be replaced after 5,000 hours or earlier if abnormal vibrationsand noise come from the bearing housing during operation.

NOTE!If the axial bearing (7) does not need to be replaced, the bearing shellsmust be placed on the same side of the axial bearing as before, but withthe axial bearing turned 180°.

10. Pull out the mechanical seal static face. Check the o-ring.

11. The seal (10) can now be checked. Press it out of the bearing housing(13) if a new one is required.

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12. The seal holder (16) does not normally need to be removed. However,if it is necessary remove the screws retaining the seal holder (16) inthe bearing housing.

13. The upper cover of the bearing housing can be removed for cleaningpurposes. In this case the plugs must also be removed.

Figure 6-18. Removing the seal holder (16) and the upper cover.

Tools:

• 24 mm box wrench



• 6 mm Allen key

• 4 mm Allen key

• Hammer

• Wrench for bearing tensioner nut


2000-12-02


6.4 Installation instructions

Bearing housing and shaft

NOTE!The position numbers in the text refers to Figure 6-17.

1. Lift the shaft into the water jet unit (from the outside with the shaftflange end foremost) so it is possible to install the mechanical sealingrotary unit.

2. Before installing the mechanical sealing rotary unit, lubricate the shaftsurface with oil. Then install the mechanical sealing rotary unit onthe shaft until the spring retainer abuts the collar on the shaft. ApplyLoctice® 222 on the locking screws; tighten to prescribed tighteningtorque. When installed, check that the seal is intact and against thecollar.

Lubricate the shaftsurface with oil

Mechanicalsealing rotary unit

Figure 6-19. Installing the mechanical sealing rotary unit.

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Installing components in the bearing housing:

NOTE!If there is sufficient room between the engine and the water jet unit, itis easier to carry out steps 3-8 on a bench indoors before installing theentire bearing housing (13) in the boat.

3. Install the seal holder (16):

• Spread out the gasket adhesive both below and on top of thegasket (15). Tighten the seal holder to prescribed tighteningtorque. Apply installation paste on the threads.

Figure 6-20. Installing the seal holder (16).

4. Install seal (10):

• Lubricate the seal with grease before installing it.

• Tap the seal into place, spring side towards the bearing, with arubber mallet and the special tool in the illustration.

Figure 6-21. Installing the seal (10).


2000-12-02


5. Install the o-ring (17).

6. Install the mechanical sealing static face and o-ring:

• Lubricate the static face o-ring with water resistant grease andinstall it onto the static face. Position the static face assemblyinto the seal holder, ensuring the slot within the static face alignsthe pin. The static face should be cleaned thoroughly before itis pressed into place by hand.

Lubricate the o-ring withwater resistant grease

Static face o-ring

O-ring (17)

Mechanical sealingstatic face

Figure 6-22. Installing the o-ring (17) and mechanical sealing static face.

7. Install the support sleeve (9) with bearing shell:

• Lubricate the support sleeve (9) with oil before installing it.

Figure 6-23. Installing the support sleeve (9).Caution!Check that the seal (10) does not deform when the support sleeve (9) is slidinto the bearing housing (13).

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8. Install the axial bearing (7):

• Carefully press the axial bearing into the bearing housing (13) untilit comes into contact with the support sleeve (9).

• Carefully tap the bearing with a plastic mallet to ensure that thebearing is in its correct position.

Figure 6-24. Installing the axial bearing (7).Caution!Check that no residue from the mallet is left on the bearing or in the bearinghousing!

Installing the bearing housing on the shaft:

9. Lubricate the threads on the shaft using installation paste.

10. Before sliding the bearing housing (13) onto the shaft:

• Clean the shaft and lubricate it with grease.

• Clean grease and dirt off the surfaces of the mechanical sealing(19).

• Check that there are no foreign objects on the shaft by sliding onthe support sleeve (6) and then check that it can be slid forwardsand backwards.


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11. Carefully press the bearing housing (13) onto the shaft until the me-chanical sealing (19) on the shaft is in contact with the static faceinside the bearing housing.

Figure 6-25. Installing the bearing housing on the shaft.Caution!The bearing housing (13) must be pressed into place carefully so that theinner seal (10) does not move and bend in the wrong direction.

12. Install the o-ring (8).

13. Install the support sleeve (6) with bearing shell.

14. Install the bearing housing cover (3) and o-ring (4). If necessary, installa new seal (5) with the spring side towards the bearing. Tap in theseal with the special tool.

15. The bearing housing assembly is screwed together with the bearingtensioner nut (1) which is locked with a locking washer (2). Tighten thebearing tensioner nut to prescribed tightening torque. Tighten fromdifferent directions.

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Figure 6-26. Installing the remaining components.

Figure 6-27. Tightening the bearing tensioner nut (1).Caution!The tightness of the bearing tensioner nut (1) should be checked after ap-proximately 30 hours of operation and re-tightened if necessary.


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16. Install the screws and nuts retaining the bearing housing (13) in theinlet duct. Tighten to prescribed tightening torque.

Figure 6-28. Tightening the entire bearing housing unit.Caution!The bearing housing must be filled with oil before the water jet unit is oper-ated. For recommended oil grade and the correct oil volume see page 117section “Recommended lubricants and sealants”.

Tools:




• 6 mm Allen key

• 4 mm Allen key

• Wrench for bearing tensioner nut

• 24 mm box wrench for torque wrench

• Torque wrench

• Pipe extension, approximately 1 m

• Screwdriver

• Plastic mallet

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Components of the inlet duct

Outer inspection hatch (1):

1. If the wire is removed, install the wire on the inlet duct. Secure theinspection hatch by attaching it to the wire.

2. Lubricate the o-ring to secure its position.

3. Install the inspection hatch with o-ring. Tighten the eye nuts properlyby hand.

Inner inspection hatch (2):

The inner inspection hatch is not installed on this water jet.

Figure 6-29. Installing the inspection hatches and anode hatch.


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Anode hatch (3):

1. Lubricate the o-ring to secure its position.

2. Screw the anode into place in the anode hatch, tighten to prescribedtightening torque.

3. Screw the anode hatch into place in the inlet duct, tighten to prescribedtightening torque.

Tools:



• Torque wrench

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Hydraulic cylinders

Caution!Ensure cleanliness when installing hydraulic components.

1. Install the seal.

2. Install the hydraulic cylinder on the water jet unit transom. Tighten toprescribed tightening torque.

3. Install the hydraulic hoses.

Figure 6-30. Installing the hydraulic cylinders.

Figure 6-31. Applying sealant.

4. Sealant must be applied on the outside of the transom.

5. Bleed the cylinder.


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Tools:


• Adjustable wrench

• Torque wrench

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Impeller housing

1. Install the impeller housing on to the inlet duct. Remember to installthe insulation washers both under the bolt and nut.

2. Tighten to prescribed tightening torque.

Figure 6-32. Installing the impeller housing.

3. Install the anodes on the impeller housing/inlet duct. Tighten to pre-scribed tightening torque.

Tools:


• 5 mm Allen key

• Torque wrench


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Impeller

Prior to installing:

1. Clean the shaft.

2. Check the key and the key-way in the shaft and in the impeller.

3. Install the o-ring.

4. Before the impeller nut and shaft sleeve are installed, lubricated themwith installation paste so they can be removed again as required.

Figure 6-33. Installing the o-ring, impeller, shaft sleeve and impeller nut.Caution!The impeller cone must not be lubricated!

5. Insert the impeller on the shaft in the impeller housing until correctcontact between the impeller and shaft surface has been obtained.Check that the key is correctly installed.

6. Use a plastic mallet to tap the impeller further along the shaft.

7. Install the shaft sleeve and the impeller nut.

8. Tighten the impeller nut to prescribed tightening torque. Counterholdthe flange end of the shaft to enable tightening.

9. Screw the locking screws into place on the impeller nut. Apply threadsealant.

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Tools:

• 4 mm Allen key

• Wrench for impeller nut

• Torque wrench

• Plastic mallet


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Guide vane chamber

Installing the new rubber bearing

1. Press in the new rubber bearing in the guide vane chamber. Applysoap as a lubricant.

Caution!When pressing in the rubber bearing, the inner section of the guide vanechamber must be supported. The application force must not be taken upby the outer section of the guide vane chamber and the guide vanes.

2. Drill Ø8.5 mm diameter holes in the rubber bearing for the lockingscrews. Do not drill all the way through. Drill only in the bakelite layer.

3. Thread the holes with M10.

4. Screw the locking screws into place. Apply thread sealant.Caution!The locking screws must not press against the rubber bearing.

5. Install the anode, tighten to prescribed tightening torque.

6. Install the end piece. Use a rubber mallet to tap the end piece into theguide vane chamber. Seal between the rubber bearing and the guidevane chamber with sealant.

Figure 6-34. Installing the rubber bearing, anode and end piece.

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Caution!The hole in the end piece must always be open so that the rubber bearingcan be lubricated by the water flowing through it.

Installing the guide vane chamber

1. Install the anodes, tighten to prescribed tightening torque.

2. Check that the contact surface between the guide vane chamber andthe impeller housing is clean.

3. Before installing the guide vane chamber, lubricate the contact surfacewith grease.

4. Install the guide vane chamber with 4 screws. Remember to installthe insulation washers.

5. Check that the impeller rotates freely in the impeller housing.

6. Screw in the remaining screws and tighten the guide vane chamber,tighten to prescribed tightening torque.

7. Install the anodes on the guide vane chamber/impeller housing,tighten to prescribed tightening torque.

Figure 6-35. Installing the guide vane chamber.


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Checking the clearance between the impeller and the impellerhousing

1. Check the clearance between the impeller blade and the impellerhousing running surface. The minimum distance is 0.3 mm. If theimpeller is hanging and touches the bottom of the impeller housing,then the maximum clearance on the opposite side must not exceed2.0 mm.

Figure 6-36. Measuring the clearance.

Tools:



• 5 mm Allen key

• Screw driver

• Ø8,5 mm drill

• Tap M10

• Rubber mallet

• Feeler gauge

• Torque wrench

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Steering nozzle

1. Install the anode on the steering nozzle, tighten to prescribed tighten-ing torque.

2. Install the bearing bushings. Seal between the bearing bushing andthe steering nozzle with sealant.

3. Position the steering nozzle.

4. Press in the distance sleeves. Check the locking of the distancesleeves.

5. Install the steering nozzle on the guide vane chamber. Tighten toprescribed tightening torque.

6. Fold up the locking tabs on the locking washer towards the screwhead.

7. Install the connecting cable to the upper retaining screw of the steeringnozzle.

Figure 6-37. Installing the steering nozzle.


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Tools:



• Hammer

• Screwdriver

• 5 mm Allen key

• Torque wrench

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Steering rod

Installing:

1. Install new bearing bushings if necessary. The bearing bushings mustrotate in the rod connections and must not be locked.

2. Install the steering rod in the steering nozzle. Remember to install theinsulation washers.

3. Set the steering cylinder in central position and check that the steeringnozzle is straight.

Figure 6-38. Installing the steering rod.

4. Install the steering rod on to the steering cylinder.

Checking the installation:

1. Check that the steering nozzle can be turned slightly more when thesteering cylinder piston rod is in its outer limit position. This must alsobe checked when the piston rod is at its inner limit position.


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2. Check that the steering nozzle does not touch the guide vane cham-ber.

Figure 6-39. Checking the steering rod installation.

3. If the criteria in the steps above are not fulfilled the length of the steer-ing rod must be adjusted as follows:

• Fold up the locking washer and unscrew the nut on the rod con-nection.

• Adjust the length of the steering rod by screwing the steering rodin and out as necessary.

• When the steering rod is adjusted, tighten the nut on the rod con-nection to prescribed tightening torque. Fold down the lockingwasher.

4. Tighten the steering rod to prescribed tightening torque. Apply threadsealant.

Tools:



• Hammer + screwdriver

• Torque wrench

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Reversing bucket

1. Install the anodes on the reversing bucket. Tighten to prescribed tight-ening torque.

2. Install the bearing bushings. Apply sealant between the reversingbucket and bearing bushing.

3. Install the reversing bucket on the guide vane chamber.

4. Press in the distance sleeves. Check the locking of the distancesleeves.

5. Tighten the reversing bucket to prescribed tightening torque

6. Fold up the locking tabs towards the screw head.

Figure 6-40. Installing the reversing bucket.

Tools:



• Screwdriver

• Torque wrench


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Reversing rod

Installing:

1. Install the anode on the reversing rod.

2. Install the bearing bushings. The bearing bushings must rotate in therod connections and must not be locked.

3. Install the reversing rod on the reversing bucket. Remember to installthe insulation washers.

Checking the installation:

1. Check that the reversing bucket does not knock against the steeringnozzle when it is raised and lowered. At the same time check alsothat the reversing bucket does not knock against the steering nozzlewhen turning the steering nozzle from side to side.

2. Check that the reversing bucket raises sufficiently so that it does notobstruct the jet of water when driving ahead.

3. Check that the reversing bucket lowers sufficiently to allow reversing.

Figure 6-41. Checking the reversing rod installation.

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4. If the criteria in steps above are not fulfilled the length of the reversingrod must be adjusted as follows:

• Fold up the locking washer and unscrew the nut on the rod con-nection.

• Adjust the length of the reversing rod by screwing the reversingrod in and out as necessary.

• When the reversing rod is adjusted, tighten the nut on the rodconnection to prescribed tightening torque. Fold down the lock-ing washer.

5. Tighten the reversing rod to prescribed tightening torque.

Tools:



• Hammer

• Screwdriver

• Torque wrench


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Shaft flange

Prior to installation:

1. Check the key and the key-way in the shaft flange and shaft.

2. Warm up the shaft flange so that it is 15-20°C warmer than its sur-roundings.

Installation:

1. Install the shaft flange.

2. Install the flange nut and locking washer.

3. Tighten the flange nut to prescribed tightening torque.

4. Allow the shaft flange to cool down and then check the tighteningtorque.

5. Fold down the locking tabs on the locking washer.

Figure 6-42. Installing the shaft flange.

Tools:

• Socket for flange nut

• Screw driver

• Torque wrench

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2000-12-02

FF410Instruction manualKamewa water jets Technical information

7. Technical information

7.1 Technical dataType designation FF410Weight (water jet only) 420 kgWater volume in inlet duct 160 lPower range 100–600 kWOil quantity in bearing housing 1.8 lHydraulic pressure of the controlsystem

approx. 90 bar

7.2 Recommended lubricants and sealantsType Rolls-Royce recommendOil in bearing housing Same as in the engineHydraulic oil for the controlsystem

Standard mineral oil ISOVG46

Sealant when installing Sikaflex® 252Bostik® 26393M® 5200

Gasket adhesive Loctite® 5203Water resistance grease SKF LGWA 2/0.4Installation paste CRC® aluminium pasteThread sealant, securingThread sealant, securingThread sealant, locking

Loctite® 243Loctite® 222Loctite® 270

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Technical information Kamewa water jets

7.3 Tightening torquesComponent FF410Mechanical sealing, locking screws 8 NmSeal holder 30 NmBearing tensioner nut 350 NmBearing housing assembly 120 NmBearing housing assembly lock nut 160 NmAnodes on the inlet duct 20 NmAnode below the anode hatch 30 NmAnode hatch 25 NmReversing cylinder 80 NmSteering cylinder 80 NmImpeller housing 70 NmAnodes on the impeller housing / inletduct 10 Nm

Impeller nut 550 NmAnode in the guide vane chamber 20 NmAnodes on the guide vane chamber 20 NmGuide vane chamber 70 NmAnodes on the guide vane chamber /impeller housing 10 Nm

Anode on the steering nozzle 8 NmSteering nozzle 180 NmSteering rod 10–15 NmLock nut for steering rod coupling 250 NmAnodes on the reversing bucket 30 NmReversing bucket 180 NmReversing rod 10–15 NmLock nut for reversing rod 180 NmShaft flange 410 NmAnode below the inspection hatch 40 Nm


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FF410Instruction manualKamewa water jets Technical information

7.4 Conversion factorsMetric to U.S. factors Multiply bymm to inches 0.03937kg to lb 2.205N to lbf 0.2248Nm to lbf ft 0.738l to U.S. gallon 0.2642m3 to cu ft 35.315m/s to ft/min 196.85

°C to °F:

U.S. to metric factors Multiply byinches to mm 25.40lb to kg 0.454lbf to N 4.448lbf ft to Nm 1.356U.S. gallon to l 3.785cu ft to m3 0.0283ft/min to m/s 0.00508

°F to °C:

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Technical information Kamewa water jets


2000-12-02

FF410Instruction manualKamewa water jets Spare parts

8. Spare parts

8.1 Ordering spare partsIn this chapter and from the enclosed “assembly drawing” you will find theinformation you need to order spare parts. Complete the spare parts formwith the information needed, you will find a copy of the form in section“DRAWINGS”.

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Spare parts Kamewa water jets

8.2 Spare part series 1, 1–2 seasons or amaximum of 1500 hours of operation

1

10

115

12

2

3

3

3

41

2

17

2

6

4

8

9


2007-09-18


Pos Qty Spare part Part number1 8 Bearing bushing 101 084 122 4 Bearing bushing 101 051 423 4 Anode 101 077 014 2 Anode 101 082 305 1 Anode 101 082 106 1 Anode 375 174 117 1 Anode 102 082 208 1 Anode 8721759 4 Anode 101 082 2010 1 O-ring 102 026 2911 1 O-ring 102 026 3912 1 Anode 101 082 28

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8.3 Other spare parts


2007-09-18


Pos Qty Spare part Part number13 1 Rubber bearing 376 014 7214 1 Shaft sleeve 410 013 0115 1 Impeller nut 450 016 1116 1 Mechanical sealing 241184517 1 O-ring 102 026 3118 2 O-ring 102 026 2519 2 Seal 102 025 9020 1 Axial bearing 102 034 80 A21 1 Bearing tensioner nut 102 029 1222 1 Locking washer 102 030 1223 1 O-ring 102 026 0324 2 Support sleeve 450 021 1325 1 Flange nut 102 029 0826 1 Locking washer 102 030 0827 1 Impeller housing 410 003 0128 1 Guide vane chamber 410 186__29 1 Impeller 410 007 __30 1 O-ring 102 026 0731 2 Distance sleeve 101 052 4232 2 Distance sleeve 410 052 0333 2 Seal 101 189 0334 1 Reversing cylinder 101 210 3635 1 Steering cylinder 101 210 35

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2007-09-18

FF410Instruction manualKamewa water jets Glossary

Glossary

Anode A metal that protects the water jet unit fromcorrosion by sacrificing itself.

Anti-fouling paint Paint that prevents fouling.

Booster Water jet unit without steering and reversingbucket. Often used as the centre water jetunit on boats with three water jet units.

Cavitation Cavitation is a phenomenon that may occurin any fluid subjected to velocity increase ora body moving rapidly through the fluid. Ac-cording to Bernoulli’s equation an increasein velocity causes a drop in static pressure.If the pressure drops to the vapour pressureof the fluid, pockets of vapour will be formed.The vapour pressure varies with the tem-perature of the fluid. These pockets maysuddenly collapse, either because they arecarried along by the liquid until they arriveat a point of higher pressure, or becausethe pressure increases again at the point inquestion. The forces then exerted by the liq-uid rushing into the cavities may cause veryhigh local pressures which can lead to se-rious erosion of boundary surfaces. In ex-treme cases light may be emitted when thecavity collapses.

Displacement boat Type of boat on which the hull never planeson the water but ploughs through the water.In contrast a planing craft functions as a dis-placement craft up to a certain speed whenthe hull rises out of the water and reachesplaning position.

Docked Dock, equipment (fixed or floating) which al-lows the boat to stand dry on the bottomwhen the water has been pumped out ofthe dock. Docks are usually used for largercraft. Smaller craft are usually lifted ontoland.

Laid up water jet unit Boat docked.

Marine gear Transmission for boats, also designated re-verse gear. Usually has only two gear posi-tions, forward and reverse, plus neutral po-

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Glossary Kamewa water jets

sition. Generally produces a reduction in en-gine speed (RPM).

Single installation Boat with one water jet unit installed.

Thrust The pressure force generated by the jet ofwater that forces the boat forward.

Twin installation Boat with two water jet units installed.

Zero thrust position All ahead and astern thrusts are equal. See“Function of the reversing bucket chapter“and section “Zero thrust position”.


2000-09-21

P.O. Box 579FIN-67701 Kokkola

FINLAND

Telephone: +358 6 832 4500Telefax: +358 6 832 4512

E-mail: [email protected]

ROLLS-ROYCE Oy Ab

manual for waterjet ff410

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