COPYRIGHT by BRIGGS & STRATTON CORPORATIONAll rights reserved. No part of this material may be reproduced or transmitted,in any form or by any means, electronic or mechanical, including photocopying,recording or by any information storage and retrieval system, without permissionin writing from Briggs & Stratton Corporation.

PRINTED IN U.S.A.

FORM MS−3848−07/25/2008REPLACES FORM MS−3848−06/02/2008FILE IN SECT. 2 OF SERVICE MANUAL

12R500

Illustrated Parts ListModel Series

12R500TYPE NUMBERS0105 through 3837

TABLE OF CONTENTS

Air Cleaner 6. . . . . . . . . . . . . . . . . . . . . . . . .

Blower Housing/Shrouds 7. . . . . . . . . . . .

Camshaft 2. . . . . . . . . . . . . . . . . . . . . . . . . .

Carburetor 4. . . . . . . . . . . . . . . . . . . . . . . . .

Controls 5. . . . . . . . . . . . . . . . . . . . . . . . . . .

Crankshaft 2. . . . . . . . . . . . . . . . . . . . . . . . .

Cylinder 2. . . . . . . . . . . . . . . . . . . . . . . . . . .

Cylinder Head 3. . . . . . . . . . . . . . . . . . . . . .

Electric Starter 7. . . . . . . . . . . . . . . . . . . . .

Engine Sump 2. . . . . . . . . . . . . . . . . . . . . . .

Exhaust System 6. . . . . . . . . . . . . . . . . . . .

Flywheel 7. . . . . . . . . . . . . . . . . . . . . . . . . . .

Fuel Supply 4. . . . . . . . . . . . . . . . . . . . . . . .

Governor Spring 5. . . . . . . . . . . . . . . . . . . .

Ignition 5. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Kits/Gaskets Sets 8. . . . . . . . . . . . . . . . . .

Lubrication 2. . . . . . . . . . . . . . . . . . . . . . . .

Piston Group 2. . . . . . . . . . . . . . . . . . . . . . .

Rewind Starter 7. . . . . . . . . . . . . . . . . . . . .

12R500

Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.3848−2 Assemblies include all parts shown in frames. 07/25/2008

2

584

585

6843

12

11A

529

306

307

718 8

9

10

32

32A

29

28 27

27

26

25

24

741

146

16

46

43

1520

12

4

22

847

287525

523

524

842

1102

1330 REPAIR MANUAL1058 OPERATOR’S MANUAL 1319 WARNING LABEL

REQUIRED when replacing partswith warning labels affixed.

12R500

Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.3848−3 Assemblies include all parts shown in frames. 07/25/2008

3

1023

1022

914

1022

51

883

718

619

1034

40

86840

33

34

7

993

886

36

35238

1029

830

192

45

1026

13

635

337

383

5

51A

51B

12R500

Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.3848−4 Assemblies include all parts shown in frames. 07/25/2008

4

365

190

972

1059

187670

601

97

633A

5195

130127

163A

276

137

104

125

134

133

975

276

117

276118

51B

122A

957B

957B

PRIMER SYSTEM

CHOKE SYSTEM

97

633A

5195

130127

137

104

134

133

975

276

125B

109C

276

276

117A

118A

633

109

633 692

127A

163A

108

98

217

CHOKE SYSTEM

97

633A

5195

130127

163A

137

104

134

133

975

276

125C

108692

276117

276118

109B

633

12R500

Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.3848−5 Assemblies include all parts shown in frames. 07/25/2008

5

51843

222B

188

202

267

265

271

269

268

270

227 562

505

615404

616

209

333

851

334

356

51A 51B

51

621222H

51

222J

51A

51B

51A

51B

745

51

621222G

51A

51B

211

356A

472

564A604A

347

532

493

341

356B

789 789A

1119

474

910

621

922923922A

923A

923B621 922A

12R500

Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.3848−6 Assemblies include all parts shown in frames. 07/25/2008

6

425

968

445

967

443

443A

529A

163A

976

966

300 613

883

613A

836

836A832

425A

968A

443B

259

529

163

976

966B

445A

967A

529A

163A

966A

677

676C

676D

883

613

613A

300B

836A

836832C

12R500

Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.3848−7 Assemblies include all parts shown in frames. 07/25/2008

7

332

455

1005363

23

37

78

305

65592

304

969921B

969A

608

60A

55 65

592

1211

1210

58

60

459

689

456

597

59

1036 EMISSIONS LABEL

969921A

997

563

949

703930A

925

930

853

697

783A

651

513

785

784

783

937

742510309A

12R500

Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.3848−8 Assemblies include all parts shown in frames. 07/25/2008

8

3

9

12

20

1022

51

883

868

7

993

524

842

163A

585

1022

51

883

868

7

993

1095 VALVE GASKET SET

358 ENGINE GASKET SET

51

163A

633A

137

104

134

276

127

633

51

163A

633A

137

276

633

977 CARBURETOR GASKET SET

51A

51B

51A

51B

51A

51B

51A

51B

121 CARBURETOR OVERHAUL KIT

163

163

163

127A

12R500

Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.3848−9 Assemblies include all parts shown in frames. 07/25/2008

9

1 692670 Cylinder Assembly−−−−−−− Note −−−−−697893 Cylinder−AssemblyUsed on Type No(s).0114, 0125, 0129,0130.

2 399269 Kit−Bushing/Seal(Magneto Side)

3 �299819S Seal−Oil(Magneto Side)

4 493279 Sump−Engine−−−−−−− Note −−−−−498983 Sump−EngineUsed on Type No(s).0114, 0133, 0157.

5 795501 Head−Cylinder7 �Δ697230 Gasket−Cylinder Head8 495786 Breather Assembly9 �699833 Gasket−Breather

10 691125 Screw(Breather Assembly)

11A 499675 Tube−Breather12 �692232 Gasket−Crankcase13 691137 Screw

(Cylinder Head)15 691680 Plug−Oil Drain

(Square Socket)16 692823 Crankshaft

Used on Type No(s).0112, 0129, 0130.−−−−−−− Note −−−−−691450 CrankshaftUsed on Type No(s).3837.691457 CrankshaftUsed on Type No(s).0105, 0114, 0120,0122, 0123, 0125,0128, 0134, 0135.692803 CrankshaftUsed on Type No(s).0133, 0157.691456 CrankshaftUsed on Type No(s).0561.

20 �399781S Seal−Oil(PTO Side)

22 691092 Screw(CrankcaseCover/Sump)

23 699488 FlywheelUsed on Type No(s).0105, 0112, 0114,0129, 0133.−−−−−−− Note −−−−−697610 FlywheelUsed on Type No(s).0120, 0122, 0123,0134, 0135, 3837.692693 FlywheelUsed on Type No(s).0125, 0130, 0561.790116 FlywheelUsed on Type No(s).0128.

24 222698S Key−Flywheel25 795429 Piston Assembly

(Standard)(Used After Code Date07090300).−−−−−−− Note −−−−−791968 PistonAssembly(Standard)(Used Before CodeDate 07090400).795430 PistonAssembly(.020” Oversize)(Used After Code Date07090300).791326 PistonAssembly(.020” Oversize)(Used Before CodeDate 07090400).

26 795431 Ring Set(Standard)(Used After Code Date07090300).−−−−−−− Note −−−−−791969 Ring Set(Standard)(Used Before CodeDate 07090400).795432 Ring Set(.020” Oversize)(Used After Code Date07090300).791324 Ring Set(.020” Oversize)(Used Before CodeDate 07090400).

27 691866 Lock−Piston Pin28 499423 Pin−Piston29 499424 Rod−Connecting32 691664 Screw

(Connecting Rod)32A 695759 Screw

(Connecting Rod)33 499642 Valve−Exhaust34 499641 Valve−Intake35 691304 Spring−Valve

(Intake)36 691304 Spring−Valve

(Exhaust)37 694086 Guard−Flywheel40 692194 Retainer−Valve43 691997 Slinger−Governor/Oil

−−−−−−− Note −−−−−691486 Slinger−Governor/OilUsed on Type No(s).0133, 0157.

45 690977 Tappet−Valve46 694039 Camshaft51���Δ692668 Gasket−Intake

51A���Δ697735 Gasket−Intake51B���Δ692555 Gasket−Intake

� Included in Engine Gasket Set−Ref. No.358.� Included in Carburetor Overhaul Kit−Ref. No. 121.

� Included in Carburetor Gasket Set−Ref. No. 977.Δ Included in Valve Gasket Set−Ref. No 1095.

REF. PART REF. PART REF. PARTNO. NO. DESCRIPTION NO. NO. DESCRIPTION NO. NO. DESCRIPTION

12R500

Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.3848−10 Assemblies include all parts shown in frames. 07/25/2008

10

55 691421 Housing−RewindStarter

58 697316 Rope−Starter(Cut To RequiredLength)

59 396892 Insert−Grip60 281434S Grip−Starter Rope

60A 393152 Grip−Starter Rope65 690837 Screw

(Rewind Starter)78 691108 Screw

(Flywheel Guard)95 691636 Screw

(Throttle Valve)97 499682 Shaft−Throttle

(Metal)−−−−−−− Note −−−−−790121 Shaft−Throttle(Plastic)

98 398185 Kit−Idle Speed104 �691242 Pin−Float Hinge108 691182 Valve−Choke109 499779 Shaft−Choke

109B 693866 Shaft−Choke109C 499681 Shaft−Choke

117 692677 Jet−Main(Standard)

117A 694250 Jet−Main(Standard)

118 497315 Jet−Main(High Altitude)

118A 497466 Jet−Main(High Altitude)

121 792383 Kit−CarburetorOverhaul

122A 792382 Spacer−Carburetor

125 790120 CarburetorUsed on Type No(s).0105, 0112, 0120,0123, 0125, 0128,0129, 0130, 0134,3837.

125B 698055 CarburetorUsed on Type No(s).0114.−−−−−−− Note −−−−−698056 CarburetorUsed on Type No(s).0122, 0135, 0561.

125C 694505 CarburetorUsed on Type No(s).0133, 0157.

127 �694468 Plug−Welch127A �691739 Plug−Welch

130 691203 Valve−Throttle−−−−−−− Note −−−−−696564 Valve−Throttle(Used With PlasticThrottle Shaft)

133 398187 Float−Carburetor134 �398188 Kit−Needle/Seat137 ��693981 Gasket−Float Bowl146 690979 Key−Timing163���691894 Gasket−Air Cleaner

163A ���692667 Gasket−Air Cleaner187 791766 Line−Fuel

(Cut to RequiredLength)

188 691147 Screw(Control Bracket)

190 690940 Screw(Fuel Tank)

192 694543 Adjuster−Rocker Arm202 691303 Link−Mechanical

Governor

209 691291 Spring−GovernorUsed on Type No(s).0112, 0128, 0129,0130.−−−−−−− Note −−−−−691851 Spring−GovernorUsed on Type No(s).3837.691290 Spring−GovernorUsed on Type No(s).0114, 0125, 0157.693032 Spring−GovernorUsed on Type No(s).0133.691292 Spring−GovernorUsed on Type No(s).0105, 0123, 0134.690319 Spring−GovernorUsed on Type No(s).0120.692906 Spring−GovernorUsed on Type No(s).0122, 0135.692433 Spring−GovernorUsed on Type No(s).0561.

211 692434 Spring−Governed Idle217 690354 Spring−Choke Return

� Included in Engine Gasket Set−Ref. No.358.� Included in Carburetor Overhaul Kit−Ref. No. 121.

� Included in Carburetor Gasket Set−Ref. No. 977.Δ Included in Valve Gasket Set−Ref. No 1095.

REF. PART REF. PART REF. PARTNO. NO. DESCRIPTION NO. NO. DESCRIPTION NO. NO. DESCRIPTION

12R500

Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.3848−11 Assemblies include all parts shown in frames. 07/25/2008

11

222B 792402 Bracket−Control−−−−−−− Note −−−−−792396 Bracket−ControlUsed on Type No(s).0123, 0133, 0134.792403 Bracket−ControlUsed on Type No(s).0120.

222G 792405 Bracket−Control−−−−−−− Note −−−−−792400 Bracket−ControlUsed on Type No(s).0561.

222H 792397 Bracket−Control222J 792404 Bracket−Control227 691467 Lever−Governor

Control238 691300 Cap−Valve259 691189 Bracket−Casing Clamp265 690798 Clamp−Casing267 691044 Screw

(Casing Clamp)268 691025 Casing−Control Wire

(Cut To RequiredLength)

269 691026 Wire−Control(Cut To RequiredLength)

270 691027 Nut(Control Wire Casing)

271 691028 Lever−Control276 ��271716 Washer−Sealing287 690940 Screw

(Dipstick Tube)300 694248 Muffler−Exhaust

Used on Type No(s).0112, 0120, 0133,0157.−−−−−−− Note −−−−−697590 MufflerUsed on Type No(s).0114, 0125, 0128,0129, 0130, 3837.

300B 699769 Muffler−Exhaust

304 499676 Housing−BlowerUsed on Type No(s).0112, 0114, 0120,0125, 0128, 0129,0130, 0133, 0157,0561.−−−−−−− Note −−−−−695976 Housing−BlowerUsed on Type No(s).0134, 0135, 3837.696527 Housing−BlowerUsed on Type No(s).0105.499677 Housing−BlowerUsed on Type No(s).0120, 0122, 0123.

305 691108 Screw(Blower Housing)

306 691232 Shield−Cylinder307 690345 Screw

(Cylinder Shield)309A 795092 Motor−Starter

332 690662 Nut(Flywheel)

333 802574 Armature−Magneto334 691061 Screw

(Magneto Armature)337 692051 Plug−Spark

(Resistor)−−−−−−− Note −−−−−692720 Plug−Spark(EMS)

341 690368 Stud(Mounting Bracket)

347 691396 Switch−Rocker356 692390 Wire−Stop

356A 693010 Wire−Stop356B 692151 Wire−Stop

358 792384 Gasket Set−Engine363 19069 Puller−Flywheel365 691129 Screw

(Carburetor)

383 19374S Wrench−Spark Plug404 690272 Washer

(Governor Crank)425 690670 Screw

(Air Cleaner Cover)425A 690244 Screw

(Air Cleaner Cover)443 691637 Screw

(Air Cleaner PrimerBase)

443A 692523 Screw(Air Cleaner PrimerBase)

443B 690255 Screw(Air Cleaner PrimerBase)

445 491588S Filter−Air CleanerCartridge

445A 697029 Filter−Air CleanerCartridge

455 791960 Cup−Flywheel456 692299 Plate−Pawl Friction459 281505S Pawl−Ratchet472 693809 Knob−Choke Shaft474 691991 Alternator493 692877 Bracket−Mounting505 691251 Nut

(Governor ControlLever)

510 795093 Drive−Starter513 692358 Clutch−Drive523 499621 Dipstick524 �692296 Seal−Dipstick Tube525 495265 Tube−Dipstick529 692937 Grommet

529A 691923 Grommet532 692851 Nut

(Mounting Bracket)563 691138 Screw

(Debris Guard Screen)562 691119 Bolt

(Governor−ControlLever)

� Included in Engine Gasket Set−Ref. No.358.� Included in Carburetor Overhaul Kit−Ref. No. 121.

� Included in Carburetor Gasket Set−Ref. No. 977.Δ Included in Valve Gasket Set−Ref. No 1095.

REF. PART REF. PART REF. PARTNO. NO. DESCRIPTION NO. NO. DESCRIPTION NO. NO. DESCRIPTION

12R500

Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.3848−12 Assemblies include all parts shown in frames. 07/25/2008

12

564A 693808 Screw(Control Cover)

584 697734 Cover−Breather Passage

585 �691879 Gasket−BreatherPassage

592 690800 Nut(Rewind Starter)

597 691696 Screw(Pawl Friction Plate)

601 791850 Clamp−Hose604A 693807 Cover−Control

Used on Type No(s).0133, 0157.−−−−−−− Note −−−−−692669 Cover−ControlUsed on Type No(s).0105, 0120, 0123,0134.

608 497680 Starter−Rewind613 691108 Screw

(Muffler)613A 691140 Screw

(Muffler)615 690340 Retainer−Governor

Shaft616 698801 Crank−Governor619 691108 Screw

(Cylinder Head Plate)621 692310 Switch−Stop633 ��691321 Seal−Choke/Throttle

Shaft633A��693867 Seal−Choke/Throttle

Shaft635 66538S Boot−Spark Plug651 691660 Screw

(Starter Gear Cover)676C 497682 Deflector−Muffler676D 692957 Deflector−Muffler

677 690661 Screw(Muffler Deflector)

670 692294 Spacer−Fuel Tank684 690345 Screw

(Breather PassageCover)

689 691855 Spring−Friction

692 690572 Spring−Detent697 691127 Screw

(Drive Cap)703 696309 Clip718 690959 Pin−Locating741 794388 Gear−Timing

(Use Without WoodruffKey)(Used After Code Date07093000).−−−−−−− Note −−−−−790345 Gear−Timing(Use Without WoodruffKey)(Used Before CodeDate 07100100).691830 Gear−Timing(Uses Woodruff Key)

742 93941 Retainer−E-Ring745 691648 Screw

(Brake)783 691918 Gear−Pinion

783A 691269 Gear−Pinion784 795095 Cover−Starter Gear785 692352 Gasket−Starter Cover789 696547 Harness−Wiring

789A 696546 Harness−Wiring830 694544 Stud−Rocker Arm832 691466 Guard−Muffler

832C 695593 Guard−Muffler836 697551 Screw

(Muffler Guard)836A 691147 Screw

(Muffler Guard)842 �691031 Seal−O Ring

(Dipstick Tube)843 691884 Sleeve−Lever847 692047 Dipstick/Tube

Assembly851 493880S Terminal−Spark Plug853 696842 Adaptor−Wire868 �Δ692044 Seal−Valve883 �Δ691893 Gasket−Valve886 696268 Gasket Set−Cylinder

Head Plate

910 691094 Stud(Alternator)

914 691108 Screw(Rocker Arm Cover)

921A 699633 Cover−Blower Housing921B 697921 Cover−Blower Housing

922 691831 Spring−Brake922A 692135 Spring−Brake

923 691994 Brake923A 695891 Brake

−−−−−−− Note −−−−−695891 Brake(Used Before CodeDate 08050100).Used on Type No(s).0134, 0135, 3837.

923B 796136 Brake(Used After Code Date08043000).Used on Type No(s).0134, 0135, 3837.

925 795403 Cover−Linkage(Used After Code Date07072200).−−−−−−− Note −−−−−690595 Cover−Linkage(Used Before CodeDate 07072300).

930 691919 Guard−Rewind930A 692675 Guard−Rewind

937 691325 Spline−Starter949 696306 Guard−Debris Screen

957B 699985 Cap−Fuel Tank(Plastic)

966 692673 Base−Air CleanerPrimer

966A 693863 Base−Air CleanerPrimer

966B 690243 Base−Air CleanerPrimer

967 493537S Filter−Pre Cleaner967A 273356S Filter−Pre Cleaner

968 692298 Cover−Air Cleaner968A 691342 Cover−Air Cleaner

� Included in Engine Gasket Set−Ref. No.358.� Included in Carburetor Overhaul Kit−Ref. No. 121.

� Included in Carburetor Gasket Set−Ref. No. 977.Δ Included in Valve Gasket Set−Ref. No 1095.

REF. PART REF. PART REF. PARTNO. NO. DESCRIPTION NO. NO. DESCRIPTION NO. NO. DESCRIPTION

12R500

Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.3848−13 Assemblies include all parts shown in frames. 07/25/2008

13

969 691138 Screw(Blower HousingCover)

969A 697922 Screw(Blower HousingCover)

972 699374 Tank−Fuel(Plastic)

975 493640 Bowl−Float976 694395 Primer−Carburetor977 792385 Gasket Set−Carburetor993 �Δ694088 Gasket−Cylinder Head

Plate997 696310 Shield−Debris

1005 691346 Fan−Flywheel1022 �Δ691890 Gasket−Rocker Cover1023 499624 Cover−Rocker Arm1026 692045 Rod−Push1029 691230 Arm−Rocker1034 691343 Guide−Push Rod1036 Label−Emissions

(Available From AnAuthorized Briggs &Stratton SeviceDealer)

1058 277102 Operator’s Manual1059 692311 Kit−Screw/Washer1095 792386 Gasket Set−Valve

1102 691255 Pilot−Guide−−−−−−− Note −−−−−691266 Pilot−GuideUsed on Type No(s).0133.

1119 692979 Screw(Alternator)

1210 498144 Pulley/Spring Assembly(Pulley)

1211 498144 Pulley/Spring Assembly(Spring)

1319 794467 Label−Warning1330 272147 Manual−Repair

� Included in Engine Gasket Set−Ref. No.358.� Included in Carburetor Overhaul Kit−Ref. No. 121.

� Included in Carburetor Gasket Set−Ref. No. 977.Δ Included in Valve Gasket Set−Ref. No 1095.

REF. PART REF. PART REF. PARTNO. NO. DESCRIPTION NO. NO. DESCRIPTION NO. NO. DESCRIPTION