Briggs & Stratton 12S900 User's Manual
Contents
1. Illustrations cover a range of engines Parts shown without text may not be used on your specific engine 10054 9 Assemblies include all parts shown in frames 06 01 2011 9 125900 621 V 843 202 227 505 Illustrations cover a range of engines Parts shown without text may not be used on your specific engine 10054 10 Assemblies include all parts shown in frames 06 01 2011 10 697 125900 1212B O w 910 789 E 789A 356 gt 1212 oni 356F eee 3658 R 356G 356H Ga k 365 Illustrations cover a range of engines Parts shown without text may not be used on your specific engine 10054 11 Assemblies include all parts shown in frames 06 01 2011 11 12 900 REF PART REF PART REF PART NO NO DESCRIPTION NO NO DESCRIPTION NO NO DESCRIPTION 1 798947 Cylinder Assembly 16 796467 Crankshaft 23 796619 Flywheel 3 299819S Seal Oil Used on Type No s Aluminum Magneto Side 0123 0139 0142 Used on Type No s 4 493279 Sump Engine 0143 0145 0148 0100 0124 0126 1411 1463 1473 0127 0129 0132 498983 Sump Engine 2139 2411 2463 0134 0135 0136 Used on Type No s 0137 0140 0141 0121 0122 0123 796468 Crankshaft 0144 0146 0149 0151 Used on Type No s 0150 0152 0153 692509 Sump Engin2. 0160 0163 Gasket Set Engine Puller Flywheel Screw Carburetor Wrench Spark Plug Washer Governor Crank 445 455 474 795066 796615 794103 691044 793515 796503 692296 796502 797301 799025 793514 690351 799026 791850 799024 Filter Air Cleaner Cartridge Cup Flywheel Alternator Used on Type No s 0127 0130 0141 0153 1411 1463 1473 2127 2141 2411 2463 Screw Stopswitch Bracket Used on Type No s 0121 0122 0123 0142 0143 0145 0148 0151 Nut Governor Control Lever Dipstick Seal Dipstick Tube Tube Dipstick Filter Air Cleaner Foam Used on Type No s 0155 0158 0159 0160 0163 Cleaner Air Used on Type No s 0155 0158 0159 0160 0163 Bolt Governor Control Lever Screw Control Cover Used on Type No s 0155 0158 0159 0160 0163 Screw Control Cover Used on Type No s 0155 0158 0159 0160 0163 Clamp Hose Cover Control Used on Type No s 0155 0158 0159 0160 0163 Illustrations cover a range of engines Parts shown without corresponding text may not be used on your specific engine Assemblies include all parts shown in frames 10054 17 17 06 01 2011 12 900 REF PART NO NO 796497 796496 796674 798327 692310 793628 796702 66538S 799646 797373 797383 793485 692010 799187 690661 691127 690959 692511 795755 93941 698557 691147 792685 DESCRIPTION Starter
3. 125900 1319 WARNING LABEL Read and follow Operating Instructions before running engine Gasoline is flammable Allow engine to cool at least 2 minutes before refueling DO NOT run in enclosed area dues 1150 F Do not touch hot parts REQUIRED when replacing parts with warning labels affixed 1036 EMISSIONS LABEL 1058 OPERATOR S MANUAL L 1330 REPAIR MANUAL LL Illustrations cover a range of engines Parts shown without text may not be used on your specific engine 10054 2 Assemblies include all parts shown in frames 2 06 01 2011 125900 45 a seo oo gt 635 SJ x 1095 VALVE GASKET SET Illustrations cover a range of engines Parts shown without text may not be used on your specific engine 10054 3 Assemblies include all parts shown in frames 06 01 2011 3 1285900 358 ENGINE GASKET SET 842 ED 1430 Dy 524 883 Illustrations cover a range of engines Parts shown without text may not be used on your specific engine 10054 4 Assemblies include all parts shown in frames 06 01 2011
4. 2128 2129 2139 799242 Guard Flywheel Used on Type No s 0153 0156 0161 0162 1564 2127 2141 2144 2145 2411 2463 2732 799242 Guard Flywheel Required for use with replacement Starter Motor Ref 309 799241 Used on Type No s 0127 0130 0132 0134 0136 0144 0146 0149 0707 0732 1257 1369 1411 1463 1473 REF NO 40 43 PART NO 692194 796650 690977 694039 796596 590398 697316 281434S 798337 691736 793480 125900 DESCRIPTION Retainer Valve Slinger Governor Oil 796525 Slinger Governor Oil Used on Type No s 0132 0134 0136 0137 0144 0146 0149 0152 0153 0154 0156 0161 0162 2144 2145 Tappet Valve Camshaft 694040 Camshaft Used on Type No s 0132 0134 0136 0137 0144 0146 0149 0152 0153 0154 0156 0161 0162 2144 2145 Gasket Intake Gasket Intake Rope Starter Cut to Required Length Grip Starter Rope Screen Rotating Used on Type No s 0141 2141 Washer Flywheel Screw Flywheel Guard Illustrations cover a range of engines Parts shown without corresponding text may not be used on your specific engine Assemblies include all parts shown in frames 10054 13 13 06 01 2011 12 900 REF PART REF PART REF PART NO NO DESCRIPTION NO NO DESCRIPTION NO NO DESCRIPTION 81 691740 Lock Muffler Screw 118 494870 Jet Main 122 796595 Spacer Carburetor 104 797622 Pin Float Hinge High Altitude 125
5. Dipstick Tube Assembly Terminal Spark Plug Terminal Spark Plug Adapter Wire Seal Valve Base Air Cleaner Gasket Exhaust Gasket Exhaust Gasket Kit Cylinder Head Plate Stud Alternator Screw Rocker Arm Cover Cover Blower Housing Used on Type No s 0141 2141 PART NO 692135 796635 796531 799427 692514 796577 692507 796254 796493 690700 796489 796611 DESCRIPTION Spring Brake Brake Cover Linkage Spline Starter Used on Type No s 0127 0130 0132 0134 0136 0141 0144 0146 0149 0707 0732 1257 1369 1411 1463 799420 Spline Starter Used on Type No s 0153 0156 0161 0162 1564 2127 2141 2144 2145 2411 2463 2732 Seal O Ring Oil Pump Cover Cap Fuel Tank EVAP Cover Oil Pump Filter Pre Cleaner Cover Air Cleaner Screw Blower Housing Cover Used on Type No s 0141 2141 Tank Fuel EVAP 798336 Tank Fuel EVAP With Gage Used on Type No s 0141 2141 Bowl Float 797631 Bowl Float Used on Type No s 0155 0158 0159 0160 0163 Illustrations cover a range of engines Parts shown without corresponding text may not be used on your specific engine Assemblies include all parts shown in frames 18 10054 18 06 01 2011 REF NO PART NO 692515 796473 796614 796480 796479 692508 796481 795990 796522 691230 691343 REF DESCRIPTION NO Gasket Oil Adapter Gasket Cylinder Head Plate Fan Flywheel Gasket Ro
6. 796608 Carburetor 117 697355 Jet Main Used on Type No s Used on Type No s Standard 0100 0121 0122 0100 0121 0122 Used on Type No s 0123 0124 0126 0123 0124 0126 0100 0121 0122 0127 0128 0129 0127 0128 0129 0123 0124 0126 0130 0132 0134 0130 0132 0134 0127 0128 0129 0135 0136 0137 0135 0136 0137 0130 0132 0134 0139 0140 0141 0140 0141 0142 0135 0136 0137 0142 0143 0144 0143 0144 0145 0139 0140 0141 0145 0146 0148 0146 0148 0149 0142 0143 0144 0149 0150 0151 0152 0153 0154 0145 0146 0148 0152 0153 0154 0156 0161 0162 0149 0150 0151 0156 0161 0162 0150 0151 0707 0152 0153 0154 0707 0732 1257 0732 1257 1368 0156 0161 0162 1368 1369 1411 1369 1411 1463 0707 0732 1257 1463 1473 1563 1473 1563 1564 1368 1369 1411 1564 1567 2127 1567 2127 2128 1463 1473 1563 2128 2129 2139 2129 2139 2141 1564 1567 2127 2141 2144 2145 2144 2145 2150 2128 2129 2139 2150 2411 2463 2411 2463 2732 2141 2144 2145 2150 2411 2463 797736 Carburetor 799604 Jet Main Used on Type No s High Altitude 0139 2139 799178 Jet Main Used on Type No s 799027 Carburetor Standard 0155 0158 0159 Used on Type No s Used on Type No s 0160 0163 0155 0158 0159 0155 0158 0159 121 796612 Kit Carburetor 0160 0163 0160 0163 Overhaul 133 398187 Float Carburetor 799235 Kit Carburetor 797626 Float Overhaul C
7. Blower Electric Start Used on Type No s 2141 2411 2463 799249 Housing Blower Electric Start Required for use with replacement Starter Motor Ref 309 799241 Used on Type No s 0141 1411 1463 1473 Motor Starter Used on Type No s 0153 0156 0161 0162 1564 2127 2141 2144 2145 2411 2463 2732 799241 799241 Motor Starter Requires Blower Housing Ref 304 798945 and Flywheel Guard Ref 37B 799242 Used on Type No s 0127 0132 0134 0136 0144 0146 0149 0707 0732 1257 1369 799241 Motor Starter Requires Blower Housing Ref 304 798946 and Flywheel Guard Ref 37B 799242 Used on Type No s 0130 799241 Motor Starter Requires Blower Housing Ref 304A 799249 and Flywheel Guard Ref 37B 799242 Used on Type No s 0141 1411 1463 1473 690662 Nut Flywheel Illustrations cover a range of engines Parts shown without corresponding text may not be used on your specific engine 10054 16 Assemblies include all parts shown in frames 16 06 01 2011 125900 DESCRIPTION REF NO PART NO REF NO PART NO REF NO PART DESCRIPTION DESCRIPTION NO 333 796499 333A 799645 334 793454 337 692051 347 795333 347A 798939 Armature Magneto 796500 Armature Magneto Used on Type No s 0121 0122 0123 0128 0130 0139 0142 0143 0145 0148 0151 0155 0158 0159 0160 0163 1411 1463 1473 2128 2139 2463 Armature M
8. Rewind Screw Muffler Retainer Governor Shaft Crank Governor Switch Stop Seal O Ring Carburetor Spacer Bracket Stopswitch Used on Type No s 0121 0122 0123 0142 0143 0145 0148 0151 Boot Spark Plug Boot Spark Plug Used on Type No s 1563 1564 1567 Spacer Used on Type No s 0130 Spacer Used on Type No s 0130 Spacer Fuel Tank Deflector Muffler Deflector Muffler Used on Type No s 0160 2128 2150 Screw Muffler Deflector Screw Drive Cap Pin Locating Screw Oil Filter Adapter Gear Timing 797521 Gear Timing Used on Type No s 0155 0158 0159 0163 Retainer E Ring Screw Brake Screw Oil Pump Cover Harness Wiring Used on Type No s 0127 0132 0134 0136 0141 0144 0146 0149 0153 0156 0161 0162 0707 0732 1257 1369 1564 2127 2141 2144 2145 2732 REF NO 789A PART NO 696546 796472 796494 798951 793500 797735 691031 691884 796501 493880S 692424 695897 795440 796492 793497 796677 799492 796498 794451 798356 REF DESCRIPTION NO Harness Wiring Used on Type No s 0130 1411 1473 2411 Stud Rocker Arm Guard Muffler Guard Muffler Used on Type No s 0152 0153 0154 0155 0156 0158 0159 0161 0162 0163 1563 1564 2127 2129 2139 2141 2144 2145 2150 2411 2463 Screw Muffler Guard Spacer Muffler Used on Type No s 0139 2139 Seal O Ring Dipstick Tube Sleeve Lever
9. 0 NN 1 FORM MS10054 REV R 06 01 2011 REPLACES FORM MS10054 REV P 02 01 2011 FILE IN SECT 2 OF SERVICE MANUAL 128900 Illustrated Parts List Model Series 12S900 TYPE NUMBERS 0100 through 2732 TABLE OF CONTENTS Air Cleaner 0000 eee 8 Alternator 00 ee 11 Blower Housing 5 Camshaft 20000 2 Carburetor 0000 9 Carburetor Overhaul Kit 9 Controls 0 eee ene 10 Covers Guards 4 5 Crankshaft 4 2 Cylinder 39 Q 2 Cylinder Head 3 Electric Starter Amn ar 11 Exhaust System 7 Flywheel a h eee 5 Fuel Supply a d 6 Gasket Set Engine 4 Gasket Set Valve 3 Governor Spring 10 IQnitiON ic cee naxe enn ee 11 Lubrication 005 6 Operator s Manual 2 Piston Rings Connecting Rod 2 Rewind Starter 5 PRINTED IN U S A COPYRIGHT by BRIGGS amp STRATTON CORPORATION All 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 permission in writing from Briggs amp Stratton Corporation
10. 28 0129 0130 0132 0134 0135 0136 0137 0140 0141 0142 0143 0144 0145 0146 0148 0149 0150 0151 0152 0153 0154 0156 0161 0162 0707 0732 1257 1368 1369 1411 1463 1473 1563 1564 1567 2127 2128 2129 2141 2144 2145 2150 2411 2463 2732 Link Choke Used on Type No s 0155 0158 0159 0160 0163 Spring Choke Return 216A 798944 798900 799179 Spring Choke Return Used on Type No s 0155 0158 0159 0160 0163 Bracket Control Manual Friction Remote amp Fixed Speed Control Lever Governor Control Cap Valve Filter Fuel Used on Type No s 0130 1567 796482 796487 691300 298090S REF NO 265 267 268 269 270 271 276 PART NO 690798 691044 691025 691026 691027 691028 271716 796486 125900 DESCRIPTION Clamp Casing Used on Type No s 0130 Screw Casing Clamp Casing Control Wire Cut To Required Length Wire Control Cut To Required Length Nut Control Wire Casing Lever Control Washer Sealing 797632 Washer Sealing Used on Type No s 0155 0158 0159 0160 0163 Thermostat Used on Type No s 0100 0121 0122 0123 0124 0126 0127 0128 0129 0130 0132 0134 0135 0136 0137 0140 0141 0142 0143 0144 0145 0146 0148 0149 0150 0151 0707 0732 1257 1368 1369 1411 1463 1473 Illustrations cover a range of engines Parts shown without corresponding text may no
11. 4 12S900 gt 668A 455 121 nt 332 7 G Illustrations cover a range of engines Parts shown without text may not be used on your specific engine 10054 5 Assemblies include all parts shown in frames 06 01 2011 5 128900 847 187 601 _ 240 187A 601 1059 Illustrations cover a range of engines Parts shown without text may not be used on your specific engine 10054 6 Assemblies include all parts shown in frames 6 06 01 2011 125900 300 D 837 300A 676A o gt AY Illustrations cover a range of engines Parts shown without text may not be used on your specific engine 10054 7 Assemblies include all parts shown in frames 06 01 2011 7 1285900 v 1395A Illustrations cover a range of engines Parts shown without text may not be used on your specific engine 10054 8 Assemblies include all parts shown in frames 06 01 2011 8 12 900 125 623 121 CARBURETOR OVERHAUL KIT Pop 623 oo A ae 104 137 276 163
12. agneto Used on Type No s 1563 1564 1567 Screw Magneto Armature Plug Spark Used on Type No s 0100 0121 0122 0123 0126 0127 0129 0132 0139 0141 0142 0143 0144 0145 0150 0151 0152 0153 0153 0155 0158 0159 0707 0732 1257 1411 1563 1564 1567 2127 2129 2139 2141 2144 2145 2150 2411 2732 692720 Plug Spark Used on Type No s 0124 0128 0130 0134 0135 0136 0137 0140 0146 0148 0149 0154 0156 0160 0161 0162 0163 1368 1369 1463 1473 2128 2463 Switch Rocker Used on Type No s 0121 0122 0123 0142 0143 0145 0148 0151 Switch Rocker Used on Type No s 0155 0158 0159 0160 0163 356 692390 797743 692602 695630 798332 798942 798943 799495 19069 793458 19576S 690272 Wire Stop Used on Type No s 0100 0124 0126 0127 0128 0129 0132 0134 0135 0136 0137 0139 0140 0141 0144 0146 0149 0150 0152 0153 0154 0156 0161 0162 0707 0732 1257 1368 1369 1563 1564 1567 2127 2128 2129 2139 2141 2144 2145 2150 2732 Wire Stop Used on Type No s 0130 Wire Stop Used on Type No s 0121 0122 0123 0142 0143 0145 0148 0151 Wire Stop Used on Type No s 0121 0122 0123 0142 0143 0145 0148 0151 Wire Stop Used on Type No s 0130 1411 1463 1473 2411 2463 Wire Stop Used on Type No s 0155 0158 0159 0160 0163 Wire Stop Used on Type No s 0155 0158 0159
13. arburetor Used on Type No s Used on Type No s 0155 0158 0159 0155 0158 0159 0160 0163 0160 0163 134 398188 Kit Needle Seat 799177 Kit Needle Seat Used on Type No s 0155 0158 0159 0160 0163 137 796610 Gasket Float Bowl 797625 Gasket Float Bowl Used on Type No s 0155 0158 0159 0160 0163 Illustrations cover a range of engines Parts shown without corresponding text may not be used on your specific engine 10054 14 Assemblies include all parts shown in frames 06 01 2011 14 REF NO 163 187 187A 192 202 209 PART NO DESCRIPTION 691894 Gasket Air Cleaner 791766 Line Fuel Cut To Required Length Line Fuel Formed Hose Adjuster Rocker Arm Link Mechanical Governor Spring Governor Used on Type No s 0121 0122 0123 0142 0143 0145 0148 0150 0151 0155 0158 0159 0163 2150 796491 796631 796657 793604 796483 Spring Governor Used on Type No s 0124 0130 0135 0136 0146 0161 796484 Spring Governor Used on Type No s 0100 0128 0132 0134 0141 0144 0149 0156 0162 0707 0732 1257 1368 1369 1411 1463 1473 1563 1564 1567 2128 2141 2144 2145 2411 2463 2732 796926 Spring Governor Used on Type No s 0126 0127 0129 0137 0139 0140 0152 0153 0154 0160 2127 2129 2139 REF NO 216 PART NO DESCRIPTION 796485 Link Choke Used on Type No s 0100 0121 0122 0123 0124 0126 0127 01
14. cker Cover Cover Rocker Arm Pump Oil Rod Push Filter Oil 798319 Filter Oil Used on Type No s 0156 0161 0162 2144 2145 Adapter Oil Filter Arm Rocker Guide Push Rod Label Emissions Available From A Briggs amp Statton Authorized Dealer PART NO 796524 279946 793471 799496 794100 796537 793479 797002 697124 793453 DESCRIPTION Tube Oil Pump Manual Operator s Kit Screw Washer Gasket Set Valve Screw Alternator Stud Blower Housing Stud Blower Housing Stud Blower Housing Used With Alternator Only Reed Breather Screw Breather Reed REF NO 1319 1330 1335 1375 1376 1395 1395A PART NO 794467 279000 793481 796476 794451 690349 798294 796477 125900 DESCRIPTION Label Warning Manual Repair Nut Blower Housing Cover Breather Reed Screw Breather Reed Cover Screw Air Cleaner Base to Carburetor Screw Air Cleaner Base to Carburetor Used on Type No s 0155 0158 0159 0160 0163 Gasket Breather Reed Illustrations cover a range of engines Parts shown without corresponding text may not be used on your specific engine Assemblies include all parts shown in frames 10054 19 19 06 01 2011 BRIGGSSSTRATTION
15. e 0124 0126 0127 0154 0156 0161 Used on Type No s 0129 0132 0134 0162 0707 0732 0132 0134 0136 0136 0137 0140 1257 1368 1369 0137 0144 0146 0141 0144 0146 1563 1564 1567 0149 0152 0153 0149 0152 0153 2127 2129 2141 0154 0156 0161 0154 0156 0161 2144 2145 2150 0162 2144 2145 0162 1257 1368 796471 Head Cylinder 1369 1563 1564 796475 Gasket Cylinder Head 1567 2127 2129 797386 Flywheel 796478 Tube Breather 2141 2144 2145 Zinc 692232 Gasket Crankcase 796469 Crankshaft Used on Type No s 793451 Screw Used on Type No s 0130 1411 1463 Cylinder Head 0100 0121 0122 1473 2411 2463 691680 Plug Oil Drain 0128 0150 0160 23B 796623 Flywheel Square Socket 0707 0732 2128 Cast Iron 2150 2732 Used on Type No s 796924 Crankshaft 0121 0122 0123 Used on Type No s 0128 0139 0142 0151 0143 0145 0148 797107 Crankshaft 0151 0155 0158 Used on Type No s 0159 0160 0163 0130 2128 2139 797909 Crankshaft 24 222698S Key Flywheel Used on Type No s 25 797302 Piston Assembly 0135 Standard 799337 Crankshaft Used on Type No s 797303 Piston 0155 0158 0159 Assembly 0163 020 Oversize 17 692517 Bearing Ball 20 399781S Seal Oil PTO Side 22 691092 Screw Crankcase Cover Sump Illustrations cover a range of engines Parts shown without corresponding text may not be used on your specific engine 10054 12 Assemblies include all parts shown in f
16. rames 06 01 2011 12 REF PART NO NO 26 797304 691588 298909 796470 691664 695759 499642 795443 691304 691304 796536 DESCRIPTION Ring Set Standard Used After Code Date 09041900 796641 Ring Set Standard Used Before Code Date 09042000 797305 Ring Set 020 Oversize Used After Code Date 09041900 796642 Ring Set 020 Oversize Used Before Code Date 09042000 Lock Piston Pin Pin Piston Rod Connecting Screw Connecting Rod Screw Connecting Rod Valve Exhaust Valve Intake Spring Valve Intake Spring Valve Exhaust Guard Flywheel Used on Type No s 0100 0121 0122 0123 0124 0126 0127 0128 0129 0130 0132 0134 0135 0136 0137 0139 0140 0141 0142 0143 0144 0145 0146 0148 0149 0150 0151 0152 0153 0154 0155 0156 0158 0159 0160 0161 0162 0163 0707 0732 1257 1368 1369 1411 1463 1473 1563 1564 1567 2127 2128 2129 2139 2141 2144 2145 2150 2411 2463 2732 REF NO 37A 37B PART NO 796534 799155 DESCRIPTION Guard Flywheel Used on Type No s 0100 0121 0122 0128 0124 0126 0128 0129 0135 0137 0139 0140 0141 0142 0143 0145 0148 0150 0151 1368 796535 Guard Flywheel Used on Type No s 0127 0130 0132 0134 0136 0144 0146 0149 0707 0732 1257 1369 1411 1463 1473 Guard Flywheel Used on Type No s 0152 0154 0155 0158 0159 0160 0163 1563 1567
17. t be used on your specific engine 10054 15 Assemblies include all parts shown in frames 15 06 01 2011 128900 REF NO 291A 300 300A PART NO 798938 796495 798940 DESCRIPTION Thermostat Used on Type No s 0152 0153 0154 0155 0156 0158 0159 0160 0161 0162 0163 1563 1564 1567 2127 2128 2129 2141 2144 2145 2150 2411 2463 2732 Muffler Exhaust Muffler Exhaust Used on Type No s 0152 0153 0154 0155 0156 0158 0159 0160 0161 0162 0163 1563 1564 1567 2127 2128 2129 2139 2141 2144 2145 2150 2411 2463 2732 REF NO 304 PART NO 796692 Housing Blower REF DESCRIPTION NO 304A Rewind Start 796693 Housing Blower Electric Start Used on Type No s 0127 0132 0134 0136 0144 0146 0149 0707 0732 1257 1369 797384 Housing Blower Electric Start Used on Type No s 0130 798945 Housing Blower Electric Start Used on Type No s 0153 0156 0161 0162 1564 2127 2144 2145 2732 798945 Housing Blower Electric Start Required for use with replacement Starter Motor Ref 309 799241 Used on Type No s 0127 0132 0134 0136 0144 0146 0149 0707 0732 1257 1369 798946 Housing Blower Required for use with replacement Starter Motor Ref 309 799241 Electric Start Used on Type No s 0130 PART NO DESCRIPTION 798333 Housing Blower Electric Start 799249 Housing
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