Illustrated Parts List Model Series 331800 TYPE NUMBERS 0026 through 4449. TABLE OF CONTENTS FORM MS3911 REV S 05/19/2012 REPLACES FORM MS3911 REV R 05/18/2012 FILE IN SECT. 2 OF SERVICE MANUAL 331800 Air Cleaner... 5 Alternator... 7 Blower Housing... 5 Camshaft... 2 Carburetor... 4 Controls... 7 Crankshaft... 2 Cylinder... 2 Cylinder Head... 3 Electric Starter... 7 Engine Sump... 2 Exhaust System... 5 Flywheel... 6 Fuel Supply... 4 Gasket Set -Engine... 2 Gasket Set -Valve... 3 Governor Spring... 7 Ignition... 7 Intake Manifold... 3 Kit -Carburetor Overhaul... 4 Lubrication... 3 Operator s Manual... 2 Piston, Rings, and Connecting Rod.. 2 Valves... 3 Warning Label... 2 PRINTED IN U.S.A. COPYRIGHT by BRIGGS & 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 & Stratton Corporation.
29 32 684 11 1319 WARNING LABEL 1058 OPERATOR S MANUAL 584 28 850 585 1264 REQUIRED when replacing parts with warning labels affixed. 1036 EMISSIONS LABEL 27 1263 7 358 ENGINE GASKET SET 12 1022 25 27 868 585 3 943 524 842 691 1266 883 51 26 20 617 1266A 51A 46 45 24 16 146 741 43 307 306 758 757 1270 1 718 759 2 3 552 691 3911-2 Assemblies include all parts shown in frames. 05/19/2012 2
4 15 4A 4C 12 22 12 1017 19 1017 20 20 20 415 415 1027 1032 3911-3 Assemblies include all parts shown in frames. 05/19/2012 3
5 306 34 868 42 33 13 1026 45 307 883 238 36 7 42 35 337 635 383 1022 51A 1029 192 1034 830 51 617 914 1023 1022 54 53 850 798 50 654 51A 617 53 186 415 54 512 186A 51 847 523 842 525 524 1024A 1095 VALVE GASKET SET 7 51 868 883 1022 965 943 750 3911-4 Assemblies include all parts shown in frames. 05/19/2012 4
125 141 131 130 95 987A 217 987A 633 108 98A 117 118 51 94 133 105A 104A 135 127A 1091 137A 947 276A 51 104A NOTE: 975A 137A 276A 1127 This Illustration Represents Several Carburetors. Parts Shown May Not Be Included In All Kits. 121A CARBURETOR OVERHAUL KIT 127A 987A 137A 187 601 98A 187D 601 240 240A 105A 633 1266 217 51A 617 1266A 276A 788 387 385A 387A 1139 385 773 3911-5 Assemblies include all parts shown in frames. 05/19/2012 5
304C 1040 967A 1279 1265A 305 305A 305B 445A 187 187D 1139 773 601 601 304E 431B 1266 964 968A 300A 967A 445A 1139 773 305C 300B 883 613A 883 187D 601 613B 187 601 884 613A 305B 864 883 81 613 864 883 81 613 300C 823 676 676A 832 836 677 677 3911-6 Assemblies include all parts shown in frames. 05/19/2012 6
563A 949A 324 415A 1070A 363 1005 23 1044 37 783 78 1051 3911-7 Assemblies include all parts shown in frames. 05/19/2012 7
DUAL CIRCUIT 5/9 AMP TRI CIRCUIT 10/16 AMP 474B 1059 474C 1059 474C 1059 474D 1059 877 877B 877B 877C 878 501A 526A 878A 526B 501D 1119 NOTE: All stators use a No. 1119 mounting screw. 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. 309 510 1051 783 513 462 579 697 801 1090 311 797 802 310 333 503 851 616 356B 729A 789 877D 334 1448 227 404 505 614 562 188 789B 729 216 202 232 268 222 209 265 267 269 271 270 559 559A 3911-8 Assemblies include all parts shown in frames. 05/19/2012 8
REF. PART REF. PART REF. PART NO. NO. DESCRIPTION NO. NO. DESCRIPTION NO. NO. DESCRIPTION 1 591465 Cylinder Assembly 12050600). 794128 Cylinder Assembly Date 12050700). 2 797673 Kit--Bushing/Seal (Magneto Side) 3 391086s Seal--Oil (Magneto Side) 4 697106 Sump--Engine 05100200). 0026, 0116. - - - - - - - Note - - - - - 795903 Sump--Engine Date 05100300). 0026, 0116. (Must Use Kit 795903, Includes Sump And Counterweight). 4A 697188 Sump--Engine 05100200). 795938 Sump--Engine Date 05100300). (Must Use Kit 795938, Includes Sump And Counterweight). 4C 591009 Sump--Engine 0110. 5 796026 Head--Cylinder 7 794114 Gasket--Cylinder Head 9 697109 Gasket--Breather 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) 13 793988 Screw (Cylinder Head) 15 690946 Plug--Oil Drain (Square Head) 331800 16 591762 Crankshaft 12071600). 0026, 0110, 0115, 0116, 0117, 0118, 0119, 0120, 0151, 0505, 0730, 0794, 0805, 0845, 0869, 1497, 2118, 2794, 3026. 797579 Crankshaft Date 12071700). 0026, 0110, 0115, 0116, 0117, 0118, 0119, 0120, 0151, 0505, 0730, 0794, 0805, 0845, 0869, 1497, 2118, 2794, 3026. 591763 Crankshaft 12071600). 0036, 0141, 0144, 0145, 0146, 0147, 0148, 0149, 0238, 0979, 1234, 1371, 1449, 1577, 2147, 2371, 2449, 3036, 4449. 797585 Crankshaft Date 12071700). 0036, 0141, 0144, 0145, 0146, 0147, 0148, 0149, 0238, 0979, 1234, 1371, 1449, 1577, 2147, 2371, 2449, 3036, 4449. 793244 Crankshaft 0113, 0114, 0142, 0143. 3911-9 Assemblies include all parts shown in frames. 05/19/2012 9
REF. PART REF. PART REF. PART NO. NO. DESCRIPTION NO. NO. DESCRIPTION NO. NO. DESCRIPTION 19 591010 Kit--Bushing/Seal (PTO Side) 20 795387 Seal--Oil (PTO Side) 22 692125 Screw (Crankcase Cover/Sump) 23 591761 Flywheel 12071600). 0730, 0805, 0979, 1234. 693557 Flywheel Date 12071700). 0730, 0805, 0979, 1234. 591760 Flywheel 12071600). 0026, 0036, 0115, 0116, 0117, 0119, 0120, 0144, 0145, 3026, 3036. 693556 Flywheel Date 12071700). 0026, 0036, 0115, 0116, 0117, 0119, 0120, 0144, 0145, 3026, 3036. 591758 Flywheel 12071600). 0110, 0113, 0114, 0118, 0141, 0142, 0143, 0146, 0147, 0148, 0149, 0238, 0794, 2118, 2147, 2794. 698282 Flywheel Date 12071700). 0110, 0113, 0114, 0118, 0141, 0142, 0143, 0146, 0147, 0148, 0149, 0238, 0794, 2118, 2147, 2794. 591759 Flywheel 12071600). 0151, 0505, 0845, 0869, 1371, 1449, 1497, 1577, 2371, 2449, 4449. 698281 Flywheel Date 12071700). 0151, 0505, 0845, 0869, 1371, 1449, 1497, 1577, 2371, 2449, 4449. 24 591757 Key--Flywheel 12071600). 796335 Key--Flywheel Date 12071700). 25 795858 Piston Assembly 08100600). 794124 Piston Assembly Date 08100700). 795877 Piston Assembly (.020 Oversize) 26 794126 Ring Set 794127 Ring Set (.020 Oversize) 27 698469 Lock--Piston Pin 28 795861 Pin--Piston 08100600). 794143 Pin--Piston Date 08100700). 29 794122 Rod--Connecting 0026, 0110, 0115, 0116, 0117, 0118, 0119, 0120, 0151, 0505, 0730, 0794, 0805, 0845, 0869, 1497, 2118, 2794, 3026. 794571 Rod-- Connecting 0036, 0113, 0114, 0141, 0142, 0143, 0144, 0145, 0146, 0147, 0148, 0149, 0238, 0240, 0241, 0242, 0979, 1234, 1371, 1449, 1577, 2147, 2371, 2449, 3036, 4449. 32 791118 Screw (Connecting Rod) 33 792868 Valve--Exhaust 34 791935 Valve--Intake 35 691279 Spring--Valve (Intake) 36 691279 Spring--Valve (Exhaust) 37 699882 Guard--Flywheel 42 499586 Keeper--Valve 43 691968 Slinger--Governor/Oil 45 690564 Tappet--Valve 46 793880 Camshaft 50 591248 Manifold--Intake 51 692137 Gasket--Intake 51A 796081 Gasket--Intake 53 591260 Stud (Carburetor) 11121800). 690227 Stud (Carburetor) Date 11121900). 54 691148 Screw (Intake Manifold) 74 697897 Screw (Rotating Screen) 78 691693 Screw (Flywheel Guard) 3911-10 Assemblies include all parts shown in frames. 05/19/2012 10
REF. PART REF. PART REF. PART NO. NO. DESCRIPTION NO. NO. DESCRIPTION NO. NO. DESCRIPTION 81 691178 Lock--Muffler Screw 94 793610 Kit--Idle Mixture 95 690718 Screw (Throttle Valve) 98A 695408 Kit--Idle Speed 104A 694918 Pin--Float Hinge 105A 696136 Valve--Float Needle 108 695419 Valve--Choke 117 796251 Jet--Main 0110, 0117, 0118, 0119, 0120, 0141, 0142, 0143, 0145, 0146, 0147, 0148, 0149, 0151, 0238, 0794, 0805, 0845, 0869, 1371, 1449, 1497, 1577, 2118, 2147, 2371, 2449, 2794, 3026, 3036, 4449. 796251 Jet--Main 08092800). 0026, 0036G1, 0114. 796251 Jet--Main 09021100). 0036E1, 0113, 0115, 0116, 0144, 0730, 0805, 0979, 1234. 791501 Jet--Main Date 08092900). 00026, 0036G1, 0114. 791501 Jet--Main Date 09021200). 0036E1, 0113, 0115, 0116, 0144, 0730, 0805, 0979, 1234. 118 791406 Jet--Main (High Altitude) 0110, 0117, 0118, 0119, 0120, 0141, 0142, 0143, 0145, 0146, 0147, 0148, 0149, 0151, 0238, 0794, 0805, 0845, 0869, 1371, 1449, 1497, 1577, 2118, 2147, 2371, 2449, 2794, 3026, 3036, 4449. 791406 Jet--Main (High Altitude) 08092800). 0026, 0036G1, 0114. 791406 Jet--Main (High Altitude) 09021100). 0036E1, 0113, 0115, 0116, 0144, 0730, 0805, 0979, 1234. 843099 Jet--Main (High Altitude) Date 08092900). 00026, 0036G1, 0114. 843099 Jet--Main (High Altitude) Date 09021200). 0036E1, 0113, 0115, 0116, 0144, 0730, 0805, 0979, 1234. 121 796184 Kit--Carburetor Overhaul (Nikki Carburetor) 125 796587 Carburetor (Nikki Carburetor) 331800 127A 690727 Plug--Welch 130 792747 Valve--Throttle 131 792765 Kit--Throttle Shaft 133 694914 Float--Carburetor 135 698780 Tube--Fuel Transfer (Gravity Feed) 792022 Tube--Fuel Transfer (Pump Feed) 137A 698781 Gasket--Float Bowl 141 792777 Kit--Choke Shaft 146 691639 Key--Timing 186 794873 Connector--Hose 186A 796532 Connector--Hose 187 791805 Line--Fuel (Formed)(10--1/4 Inches Long)(Cut to Required Length) 187D 791744 Line--Fuel (Formed)(14 Inches Long)(Cut To Required Length) 188 691693 Screw (Control Bracket) 192 691986 Adjuster--Rocker Arm 202 691841 Link--Mechanical Governor 209 796260 Spring--Governor 792602 Spring-- Governor 0117, 0118, 0144, 0145, 0147, 0148, 0149, 2118, 2147. 216 691840 Link--Choke 217 695409 Spring--Choke Return 222 694042 Bracket--Control 227 691374 Lever--Governor Control 232 691842 Spring--Governor Link 238 691843 Cap--Valve 3911-11 Assemblies include all parts shown in frames. 05/19/2012 11
REF. PART REF. PART REF. PART NO. NO. DESCRIPTION NO. NO. DESCRIPTION NO. NO. DESCRIPTION 240 394358s Filter--Fuel (White, 75 Microns) 0151, 0505, 0730, 0805, 0845, 0869, 0979, 1497. 240A 691035 Filter--Fuel (Includes Paper Element With A 40 Micron Rating) 0026, 0036, 0113, 0110, 0114, 0115, 0116, 0117, 0118, 0119, 0120, 0141, 0142, 0143, 0144, 0145, 0146, 0147, 0148, 0149, 0238, 0794, 1234, 1371, 1449, 1577, 2118, 2147, 2371, 2449, 2794, 3026, 3036, 4449. 265 691024 Clamp--Casing 267 794904 Screw (Casing Clamp) 268 691025 Casing--Control Wire (Cut To Required Length) 269 691026 Wire--Control (Cut To Required Length) 270 691027 Nut (Control Wire Casing) 271 691028 Lever--Control 276A 695410 Washer--Sealing 300A 300B 300C 795998 Muffler 0110, 0117, 0118, 2118. 795997 Muffler 0026, 0036, 0115, 0120, 3026, 3036. 498984S Muffler 0119. 304C 798670 Housing--Blower (Black) (No longer Available, For Replacement Blower Housing Order Reference 304E) 304E 592814 Housing--Blower (Black) (Compatible With Canister Style Filter) 13042100). 591644 Housing--Blower (Black) (Compatible With Canister Style Filter) Date 13042200). 305 697102 Screw (Blower Housing) 305A 793376 Screw (Blower Housing) 305B 795891 Screw (Blower Housing to Intake Elbow) 305C 799370 Screw 306 794953 Shield--Cylinder 796006 Shield-- Cylinder 0026, 0116, 3026. 307 691693 Screw (Cylinder Shield) 309 693551 Motor--Starter 310 690323 Screw (Starter Motor) 311 497608 Brush Set 324 796309 Screen--Rotating 333 799650 Armature--Magneto 334 691061 Screw (Magneto Armature) 337 491055s Plug--Spark 691043 Plug--Spark 0119, 0120, 0151. 792015 Plug--Spark 0240, 0241. 356 697089 Wire--Stop 358 796187 Gasket Set--Engine 363 19203 Puller--Flywheel 383 19576s Wrench--Spark Plug 385 694476 Screw (Fuel Pump) 385A 690297 Screw (Fuel Pump) 387 697090 Pump--Fuel Date 08073000). 387A 808656 Pump--Fuel 08072900). 404 691691 Washer (Governor Crank) 415 794903 Plug 415A 794129 Plug (Cover/Retainer) 431B 799043 Elbow--Intake 445A 793569 Filter--Air Cleaner Cartridge 462 691261 Washer (Starter Cable) 474B 696459 Alternator (Dual Circuit) 0505, 0730, 0805, 0845, 0869, 0979, 1234, 1371, 1449, 1497, 1577, 2371, 2449, 4449. 3911-12 Assemblies include all parts shown in frames. 05/19/2012 12
REF. PART REF. PART REF. PART NO. NO. DESCRIPTION NO. NO. DESCRIPTION NO. NO. DESCRIPTION 474C 696457 Alternator (5/9 Amp. Regulated Or Tri Circuit) 0026, 0036, 0110, 0113, 0114, 0117, 0118, 0119, 0120, 0141, 0142, 0143, 0144, 0145, 0146, 0147, 0148, 0149, 0238, 0240, 0241, 0242, 0794, 2118, 2147, 2794, 3026, 3036. 474D 696458 Alternator (10--16 Amp.) 0115, 0116. 501A 794360 Regulator (5/9 Amp. Regulated) 501D 797375 Regulator 503 691532 Strap--Starter 505 691251 Nut (Governor Control Lever) 510 693699 Drive--Starter 512 796530 Hose--Oil Drain 513 692024 Clutch--Drive 523 699908 Dipstick 524 691032 Seal--Dipstick Tube 525 697085 Tube--Dipstick 0026, 0036, 0110, 0113, 0114, 0115, 0116, 0117, 0118, 0119, 0120, 0141, 0142, 0143, 0144, 0145, 0146, 0147, 0148, 0149, 0238, 0794, 1449, 2118, 2147, 2449, 2794, 3026, 3036, 4449. 697184 Tube--Dipstick 0151, 0505, 0730, 0805, 0845, 0869, 0979, 1234, 1371, 1497, 1577, 2371. 526A 697088 Screw (Regulator) 526B 697348 Screw (Regulator) 552 697144 Bushing--Governor Crank 559 697561 Screw (.375 Inches Remote Choke Stop) 559A 693675 Screw (.419 Inches Remote Choke Stop) 562 691119 Bolt (Governor Control Lever) 563A 799359 Screw (Debris Guard) 578 692306 Wire Assembly 579 691029 Nut (Starter Cable) 584 794682 Cover--Breather Passage (Use With Liquid Sealant Reference 850) 601 791850 Clamp--Hose 613 691416 Screw (Muffler) 613A 691678 Screw (Muffler) 613B 690297 Screw (Muffler) 614 691620 Pin--Cotter 616 692012 Crank--Governor 617 692138 Seal--O Ring (Intake Manifold) 633 699813 Seal--Choke/Throttle Shaft 635 691909 Boot--Spark Plug 654 690958 Nut (Carburetor) 676 795036 Deflector--Muffler 0026, 0036, 0117, 0118, 0119, 2118, 3026, 3036. 676A 396903 Deflector--Muffler 0115, 0120. 677 690661 Screw (Muffler Deflector) 691 692407 Seal--Governor Shaft 697 791680 Screw (Drive Cap) 331800 718 690959 Pin--Locating 729 691335 Clip--Wire (Wire Saddle) 729A 691224 Clip--Wire (Aluminum Coated Steel) 741 697128 Gear--Timing 750 790832 Screw (Oil Pump Cover) 757 793242 Link--Counterweight 758 793763 Counterweight 05100200). - - - - - - - Note - - - - - 795938 Counterweight Date 05100300). (Must Use Kit 795938, Includes Sump And Counterweight). 793763 Counterweight 05100200). 0026, 0116. 795903 Counterweight Date 05100300). 0026, 0116. (Must Use Kit 795903, Includes Sump And Counterweight). 759 697392 Pin--Counterweight 773 796448 Retainer 783 693713 Gear--Pinion 788 699347 Bracket--Fuel Pump 789 698329 Harness--Wiring 789B 692037 Harness--Wiring 797 693167 Nut (Brush Retainer) 798 697890 Screw Intake Manifold Mounting 801 691283 Cap--Drive 802 691286 Cap--End 823 698941 Screw (Muffler Adapter) 830 691095 Stud--Rocker Arm 832 790244 Guard--Muffler 836 690367 Screw (Muffler Guard) 3911-13 Assemblies include all parts shown in frames. 05/19/2012 13
REF. PART REF. PART REF. PART NO. NO. DESCRIPTION NO. NO. DESCRIPTION NO. NO. DESCRIPTION 842 691031 Seal--O Ring (Dipstick Tube) 847 790443 Dipstick/Tube Assembly 0026, 0036, 0110, 0113, 0114, 0115, 0116, 0117, 0118, 0119, 0120, 0141, 0142, 0143, 0144, 0145, 0146, 0147, 0148, 0149, 0238, 0794, 1449, 2118, 2147, 2449, 2794, 3026, 3036, 4449. 790442 Dipstick/Tube Assembly 0151, 0505, 0730, 0805, 0845, 0869, 0979, 1234, 1371, 1497, 1577, 2371. 850 100106 Sealant--Liquid 07071800). 851 692424 Terminal--Spark Plug 864 794661 Adapter--Muffler (Length 1.75 Inches) 796002 Adapter-- Muffler (Length 2.25 Inches) 868 690968 Seal--Valve 877 393456 Wire/Connector-- Alternator (Dual Circuit) 877B 393357 Wire/Connector-- Alternator (5/9 Amp. Regulated Or Tri Circuit) 877C 399916 Wire/Connector-- Alternator (10--16 Amp.) 877D 790544 Wire/Connector-- Alternator 878 398661 Harness--Alternator (Dual Circuit) 878A 691955 Harness--Alternator (Tri Circuit) 883 692236 Gasket--Exhaust 884 691956 Clamp--Muffler 914 691108 Screw (Rocker Cover) 943 690589 Seal--O Ring (Oil Pump Cover) 947 699915 Solenoid--Fuel 949A 799358 Guard--Debris Screen 964 799159 Cap--Connector 965 499613 Cover--Oil Pump 967A 793685 Filter--Pre Cleaner 968A 591648 Cover--Air Cleaner (Black) (Compatible With Canister Style Filter) 975A 699502 Bowl--Float 987A 698777 Seal--Throttle Shaft 1005 796084 Fan--Flywheel 1017 690770 Screen--Oil Pump 1022 272475S Gasket--Rocker Cover Date 07091000). (After Date Code Use Liquid Sealant Reference 850) 1023 794569 Cover--Rocker 1024A 794644 Pump--Oil 1026 692003 Rod--Push (Intake) 692011 Rod--Push (Exhaust) 1027 795890 Filter--Oil (Premium) (Yellow) 492932S Filter--Oil (Black) 1029 691751 Arm--Rocker 1032 491710 Ball--Oil Pump Date 04062800). 1034 690822 Guide--Push Rod 1035 693784 Shaft--Pump 1036 Label--Emissions (Available From A Briggs & Stratton Authorized Dealer) 1040 698368 Plate--Trim 1044 698139 Screw (Flywheel) 1051 691265 Ring--Retaining 1058 277675 Operator s Manual 1059 698516 Kit--Screw/Washer 1070A 690363 Screw (Flywheel Fan) Date 08061900). 1090 691293 Retainer--Brush 1091 691333 Cap--Limiter 1095 794152 Gasket Set--Valve 1119 691183 Screw (Alternator) 1127 695407 Screw (Float Bowl) 1139 796449 Washer 1263 697124 Reed--Breather 1264 697104 Screw (Breather Reed) 1265A 794151 Support--Blower Housing 1266 691917 Seal--O Ring (Intake Elbow) 1266A 697123 Seal--O Ring 1270 793243 Plug--AVS Counterweight 1279 691108 Screw (Blower Housing Support) 1319 794467 Label--Warning 1448 690260 Washer (Magneto Armature) 3911-14 Assemblies include all parts shown in frames. 05/19/2012 14