Briggs & Stratton 21B900 Series Setup guide

Not for

Reproduction

in any form or by any means, electronic or mechanical, including photocopying,

recording or by any information storage and retrieval system, without permission

in writing from Briggs & Stratton Corporation.

PRINTED IN U.S.A.

FORM MS--5036--03/23/2009

REPLACES FORM MS--5036--06/18/2008

FILE IN SECT. 2 OF SERVICE MANUAL

21B900

Illustrated Parts List

Model Series

21B900

TYPE NUMBERS

0015 through 0206.

TABLE OF CONTENTS

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

Alternator 9..........................

Blower Housing 6.....................

Camshaft 3...........................

Carburetor 5..........................

Controls 8............................

Crankshaft 3..........................

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

Cylinder Head 4.......................

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

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

Fuel Supply 8.........................

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

Gasket Set -- Engine 4.................

Gasket Set -- Valve 4..................

Governor Spring 8....................

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

Ignition 8.............................

Intake Manifold 4.....................

Kit -- Carburetor Overhaul 5............

Lubrication 3.........................

Operator’s Manual 2..................

Piston, Rings, Connecting Rod 3.......

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

Valves 4..............................

Warning Label 2......................

Not for

Reproduction

21B900

Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.

5036--2 Assemblies include all parts shown in frames. 03/23/2009

750

943

965

1024A

307

306

691

718

552

584

1263

1264

1027

1017

415

239

1058 OPERATOR’S MANUAL 1319 WARNING LABEL

REQUIRED when replacing parts

with warning labels affixed.

850

Not for

Reproduction

21B900

Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.

5036--3 Assemblies include all parts shown in frames. 03/23/2009

842

524

847

523

525

741

146

357

1270

757

758

759

Not for

Reproduction

21B900

Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.

5036--4 Assemblies include all parts shown in frames. 03/23/2009

654

635

830

1034

1022

883

238

36 868

1022

1023

914

383

192

1029

1026

337

705

617 51

850 51A

617

51A

186

415

1022

358 ENGINE GASKET SET

868

691

524 51

617

883 1266

842 1266A

51A

943

1022

868

1095 VALVE GASKET SET

883

51A

Not for

Reproduction

21B900

Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.

5036--5 Assemblies include all parts shown in frames. 03/23/2009

950

276

137

104

105

142 1091

987

130

LMT / PART

NUMBER

LOCATIONS 106

131

133

975

WALBRO

143

127

634 108

141

104

105

106

137

142

987

127

634

276

121 CARBURETOR OVERHAUL KIT

977 CARBURETOR GASKET SET

51 137 276

1266

1266A

617

276A

118

1091

1127

104A

105A

987A

95A

130A

NIKKI

98A

133A

94A

975A

131A

127A

117

125A

135A

137A

This Illustration Represents Several

Carburetors. Parts Shown May Not

Be Included In All Kits.

634A

141A

108A

217

141C

652

121A CARBURETOR OVERHAUL KIT

95A

104A

105A 127A

634A

51 1266

1266A

987A

137A137A137A137A

617

51A

217

98A

947A

Not for

Reproduction

21B900

Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.

5036--6 Assemblies include all parts shown in frames. 03/23/2009

1040

613

613A

883

823

677

864

676

613

1040A

676A

677

1266A

1266

431

1036 EMISSIONS LABEL

613B

304

1267

967

643

968

445

187D

601

187A

601

773

1139

305

305A

883

864

883 883

300A 300B

Not for

Reproduction

21B900

Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.

5036--7 Assemblies include all parts shown in frames. 03/23/2009

697

783

1051

363

729A

802

579

1051

310

801

311

797

513

783

37A

597

456

689

459

1044

309

510

608

1090

455

23A

563

493

949

78A

729B

1070

1005

1005A

1070A

1005B

415A

73A

Not for

Reproduction

21B900

Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.

5036--8 Assemblies include all parts shown in frames. 03/23/2009

527

356B

1054

356

729

240 240A

918

601

187

601

385A

387

387A

385

957

972

601

187B

521

789

356A

356C

789A

601

187A

788

385

387A

601

187B

601

187C 527A

729

789B

920

216

202

232

267

265

209

222

188

616

404

614

562

505

227

559

559A

621

268

269

271

270

359

507 520

373

851

334

333

205

203

958

601A

216A

601

187D

670

Not for

Reproduction

21B900

Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.

5036--9 Assemblies include all parts shown in frames. 03/23/2009

578 878

474B 474C

877A 877B

877

DUAL

CIRCUIT

DC ONLY

NOTE: All stators use a No. mounting screw.

1119

NOTE: The proper flywheel part number and/or the alternator magnet size will

determine the alternator type or output. See repair instruction manual

for additional information.

474A 1059 10591059

501A

526A

TRI

578

501B

526B

877C

10 -- 16 AMP

474D 1059

578

501D

526B

CIRCUIT

501C

526A

Not for

Reproduction

REF. PART REF. PART REF. PART

NO. NO. DESCRIPTION NO. NO. DESCRIPTION NO. NO. DESCRIPTION

21B900

Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.

5036--10 Assemblies include all parts shown in frames. 03/23/2009

1 697377 Cylinder Assembly

2 399265 Kit--Bushing/Seal

(Magneto Side)

3 391086S Seal--Oil

(Magneto Side)

4 697106 Sump--Engine

(Used After Code Date

05100200).

-- -- -- -- -- -- N o t e -- -- -- -- -- --

795940 Sump--Engine

(Used Before Code

Date 05100200).

Must Use Kit 795940,

Includes Sump And

Counterweight.

4A 697188 Sump--Engine

(Used After Code Date

05100200).

Used on Type No(s).

0016, 0036, 0038,

0110, 0114, 0116,

0117, 0119, 0120,

0123, 0124, 0126,

0127, 0129, 0130,

0136, 0138, 0141,

0142, 0146, 0147,

0149, 0152, 0155,

0156, 0157, 0160,

0163, 0183, 0190,

0193, 0194, 0195,

0197, 0198, 0202,

0205, 0206.

-- -- -- -- -- -- N o t e -- -- -- -- -- --

795957 Sump--Engine

(Used Before Code

Date 05100200).

Used on Type No(s).

0016, 0036, 0038,

0110, 0114, 0116,

0117, 0119, 0120,

0123, 0124, 0126,

0127, 0129, 0130,

0136, 0138, 0141,

0142, 0146, 0147,

0149, 0152, 0155,

0156, 0157, 0163,

0183, 0190, 0193,

0194, 0195, 0197,

0198, 0202.

Must Use Kit 795957,

Includes Sump And

Counterweight.

5 796183 Head--Cylinder

7 273280S Gasket--Cylinder Head

9 697109 Gasket--Breather

(Used Before Code

Date 07071900).

(After Date Code Use

Liquid Sealant

Reference 850)

10 697157 Screw

(Breather Assembly)

11 794683 Tube--Breather

12 697110 Gasket--Crankcase

(.015” Thick)

(Standard)

13 690360 Screw

(Cylinder Head)

14 790560 Stud

(Cylinder Head)

15 690946 Plug--Oil Drain

(3/8” Standard)

16 697390 Crankshaft

20 795387 Seal--Oil

(PTO Side)

22 692125 Screw

(Crankcase

Cover/Sump)

23 698281 Flywheel

Used on Type No(s).

0026, 0036, 0038,

0120, 0121, 0124,

0129, 0131, 0132,

0138, 0140, 0141,

0146, 0147, 0149,

0152, 0153, 0159,

0163, 0183, 0190,

0193, 0203, 0205.

-- -- -- -- -- -- N o t e -- -- -- -- -- --

693556 Flywheel

Used on Type No(s).

0020, 0127, 0157,

0192, 0194, 0198,

0202.

693557 Flywheel

Used on Type No(s).

0028, 0126, 0154,

0156, 0160, 0164.

698282 Flywheel

Used on Type No(s).

0110, 0119, 0123,

0130, 0136, 0155,

0195, 0197, 0206.

23A 693555 Flywheel

(Rewind Starter)

Used on Type No(s).

0015, 0016, 0117,

0142.

-- -- -- -- -- -- N o t e -- -- -- -- -- --

698283 Flywheel

(Rewind Starter)

Used on Type No(s).

0022, 0116.

24 222698S Key--Flywheel

25 792307 Piston Assembly

(Standard)

-- -- -- -- -- -- N o t e -- -- -- -- -- --

792728 Piston

Assembly

(.020” Oversize)

26 792306 Ring Set

(Standard)

-- -- -- -- -- -- N o t e -- -- -- -- -- --

792643 Ring Set

(.020” Oversize)

27 698469 Lock--Piston Pin

(Used After Code Date

02100300).

-- -- -- -- -- -- N o t e -- -- -- -- -- --

698138 Lock--Piston

(Used Before Code

Date 02100400).

28 697099 Pin--Piston

29 791633 Rod--Connecting

(Standard)

-- -- -- -- -- -- N o t e -- -- -- -- -- --

697262 Rod--

Connecting

(.020” Undersize)

(Used Before Code

Date 05040400).

32 791118 Screw

(Connecting Rod)

33 695760 Valve--Exhaust

34 791935 Valve--Intake

35 691279 Spring--Valve

(Intake)

36 691279 Spring--Valve

(Exhaust)

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