FORM MS−3673−10/23/2006
REPLACES FORM MS−3673−04/25/2006
FILE IN SECT. 2 OF SERVICE MANUAL
31P900
Illustrated Parts List
Model Series
31P900
TYPE NUMBERS
0036 through 0671.
TABLE OF CONTENTS
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
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
Piston, Rings, and Connecting Rod . . . 2
Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
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.
31P900
847
523
842
1095 VALVE GASKET SET
51
7
1022
525
868
1024
524
1027A
1027
965
943
5
33
34
750
868
42
42
45
13
238
1026
36
7
337
51
35
635
383
1022
617
1034
830
192
1029
51
50
617
54
53
654
1022
914
1023
Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.
3673−3
Assemblies include all parts shown in frames.
10/23/2006
3
31P900
125A
141B
634B
131A
117A
108B
130A
95A
987A
98A
94A
51
105A
104A
1091
127A
133A
975A
135
137A
137A
947A
276A
NIKKI
1127
121ACARBURETOR OVERHAUL KIT
51
617
127A
1266
240
634B
987A
137A
95A
104A
105A
240A
1266A
431
1266A
387
187B
385A
918
387A
601
1266
601
385
Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.
3673−4
Assemblies include all parts shown in frames.
10/23/2006
4
31P900
304
1267
968
305A
1040B
643
74
967
73
445
305
1036 EMISSIONS LABEL
Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.
3673−5
Assemblies include all parts shown in frames.
10/23/2006
5
31P900
78
37
1070
1005
363
1044
23
1051
783
Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.
3673−6
Assemblies include all parts shown in frames.
10/23/2006
6
31P900
DUAL
CIRCUIT
TRI
CIRCUIT
474A
877
474B
1059
1059
877B
878
878A
526
501
1119
mounting screw.
NOTE: All stators use a No.
NOTE: The proper flywheel part number and/or the alternator magnet size will
determinethe alternator type or output. See repair instruction manual
for additional information.
789A
334
309
333
851
801
544
729B
729A
697
1051
510
783
513
356
310
803
1054
1090
311
503
462
579
797
802
227
562
616
505
404
614
202
188
216
222
209
232
265
559
270
267
559A
268
269
271
Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.
3673−7
Assemblies include all parts shown in frames.
10/23/2006
7
31P900
REF.
NO.
PART
NO.
REF.
NO.
PART
NO.
REF.
NO.
PART
NO.
DESCRIPTION
DESCRIPTION
DESCRIPTION
1
2
697174 Cylinder Assembly
399265 Kit−Bushing/Seal
(Magneto Side)
29
791632 Rod−Connecting
Used on Type No(s).
0036, 0670.
135
792022 Tube−Fuel Transfer
Used on Type No(s).
0036, 0671.
−−−−−− Note −−−−−−
791631 Rod−
Connecting
Used on Type No(s).
0449, 0575, 0635,
0652, 0671.
3 K391086s Seal−Oil
(Magneto Side)
−−−−−− Note −−−−−−
698780 Tube−Fuel
Transfer
Used on Type No(s).
0449, 0575, 0635,
0652, 0670.
4A
5
697188 Sump−Engine
792770 Head−Cylinder
7 K∆699168 Gasket−Cylinder Head
9
10
K697109 Gasket−Breather
697157 Screw
32
791118 Screw
137A D698781 Gasket−Float Bowl
(Connecting Rod)
791934 Valve−Exhaust
791935 Valve−Intake
691279 Spring−Valve
(Intake)
691279 Spring−Valve
(Exhaust)
697352 Guard−Flywheel
499586 Keeper−Valve
691968 Slinger−Governor/Oil
690564 Tappet−Valve
791942 Camshaft
690193 Manifold−Intake
(Breather Assembly)
697113 Tube−Breather
141B
146
698778 Kit−Choke Shaft
691639 Key−Timing
Used on Type No(s).
0449, 0575, 0635,
0652, 0671.
33
34
35
11
12 K697110 Gasket−Crankcase
(.015” Thick)
(Standard)
690360 Screw
(Cylinder Head)
690946 Plug−Oil Drain
(Square Head)
697516 Crankshaft
36
13
15
16
−−−−−− Note −−−−−−
690979 Key−Timing
Used on Type No(s).
0036, 0670.
37
42
43
45
46
50
187
791766 Line−Fuel
(15 Inches Long)(Cut
To Required Length)
791805 Line−Fuel
(Formed)(10−1/4
Inches Long)(Cut to
Required Length)
691693 Screw
Used on Type No(s).
0036, 0670.
−−−−−− Note −−−−−−
697127 Crankshaft
Used on Type No(s).
0449, 0575, 0635,
0652, 0671.
187B
51K∆D692137 Gasket−Intake
53
690227 Stud
(Carburetor)
691148 Screw
(Intake Manifold)
54
188
20 K791892 Seal−Oil
(Control Bracket)
73
74
697133 Screen−Rotating
697897 Screw
(Rotating Screen)
691003 Screw
(Flywheel Guard)
695425 Kit−Idle Mixture
(PTO Side)
192
202
691986 Adjuster−Rocker Arm
691841 Link−Mechanical
Governor
692208 Spring−Governor
691840 Link−Choke
694042 Bracket−Control
691374 Lever−Governor
Control
22
692125 Screw
(Crankcase
Cover/Sump)
693556 Flywheel
78
209
216
222
227
23
94A
Used on Type No(s).
0036, 0671.
−−−−−− Note −−−−−−
693557 Flywheel
Used on Type No(s).
0449, 0575, 0635,
0652, 0670.
95A D690718 Screw
(Throttle Valve)
695408 Kit−Idle Speed
104A D694918 Pin−Float Hinge
105A D696136 Valve−Float Needle
98A
232
238
691842 Spring−Governor Link
691843 Cap−Valve
240 394358s Filter−Fuel
108B
117A
695419 Valve−Choke
792296 Jet−Main
(Standard)
792369 Kit−Carburetor
Overhaul
(Nikki Carburetor)
792768 Carburetor
(Nikki Carburetor)
(White, 75 Microns)
Used on Type No(s).
0449, 0575, 0652,
0635, 0670.
24 222698s Key−Flywheel
25
792507 Piston Assembly
(Standard)
121A
125A
−−−−−− Note −−−−−−
792648 Piston
Assembly
240A
265
691035 Filter−Fuel
(Includes Paper
Element With A 40
Micron Rating)
Used on Type No(s).
0036, 0671.
(.020” Oversize)
791936 Ring Set
(Standard)
26
127A D690727 Plug−Welch
130A
131A
133A
792747 Valve−Throttle
792765 Kit−Throttle Shaft
694914 Float−Carburetor
−−−−−− Note −−−−−−
791947 Ring Set
(.020” Oversize)
698469 Lock−Piston Pin
697099 Pin−Piston
(Standard)
691024 Clamp−Casing
27
28
K Included in Engine Gasket Set−Ref. No.358.
D Included in Carburetor Overhaul Kit−Ref. No. 121A.
∆ Included in Valve Gasket Set−Ref. No 1095.
Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.
3673−8
Assemblies include all parts shown in frames.
10/23/2006
8
31P900
DESCRIPTION
REF.
NO.
PART
NO.
REF.
NO.
PART
NO.
REF.
NO.
PART
NO.
DESCRIPTION
DESCRIPTION
267
792629 Screw
(Casing Clamp)
Used on Type No(s).
0036, 0652.
691025 Casing−Control Wire
(Cut To Required
Length)
691026 Wire−Control
(Cut To Required
Length)
415
690283 Plug
(Sump)
697122 Elbow−Intake
Used on Type No(s).
562
691119 Bolt
(Governor Control
Lever)
691029 Nut
(Starter Cable)
697112 Cover−Breather
Passage
791850 Clamp−Hose
691620 Pin−Cotter
692012 Crank−Governor
431
579
584
268
269
270
0652.
445
698083 Filter−Air Cleaner
Cartridge
(Non Washable)
−−−−−− Note −−−−−−
697153 Filter−Air
Cleaner Cartridge
(Washable)
601
614
616
691027 Nut
617 KD692138 Seal−O Ring
(Intake Manifold)
634B D698779 Spring/Seal Assembly
635
643
654
(Control Wire Casing)
691028 Lever−Control
695410 Washer−Sealing
698599 Housing−Blower
(Black)
271
276A
304
462
691261 Washer
(Starter Cable)
696459 Alternator
(Dual Circuit)
691909 Boot−Spark Plug
698401 Retainer−Air Filter
690958 Nut
474A
Used on Type No(s).
0449, 0575, 0671.
−−−−−− Note −−−−−−
699704 Housing−
Blower
Used on Type No(s).
0449, 0575, 0635,
0652, 0670.
(Carburetor)
691 K692407 Seal−Governor Shaft
697
690372 Screw
(Drive Cap)
474B
501
696457 Alternator
(Tri Circuit)
Used on Type No(s).
0036, 0671.
718
729A
729B
741
690959 Pin−Locating
691224 Clip−Wire
694123 Clip−Wire
697128 Gear−Timing
790832 Screw
(Black)
Used on Type No(s).
0036, 0635, 0652,
0670.
691188 Regulator
Used on Type No(s).
0036, 0671.
691532 Strap−Starter
691251 Nut
(Governor Control
Lever)
693699 Drive−Starter
692024 Clutch−Drive
699908 Dipstick
750
305
697102 Screw
(Blower Housing)
697103 Screw
(Blower Housing)
697107 Shield−Cylinder
691003 Screw
(Cylinder Shield)
693551 Motor−Starter
690323 Screw
(Oil Pump Cover)
503
505
757
758
759
783
789A
697607 Link−Counterweight
697134 Counterweight
697392 Pin−Counterweight
693713 Gear−Pinion
698329 Harness−Wiring
Used on Type No(s).
0036, 0652, 0671.
305A
306
307
510
513
523
309
310
524 K691032 Seal−Dipstick Tube
525
(Starter Motor)
797
693167 Nut
697085 Tube−Dipstick
311
333
334
497608 Brush Set
492341 Armature−Magneto
691061 Screw
(Brush Retainer)
Used on Type No(s).
0036, 0671.
801
802
803
691283 Cap−Drive
691286 Cap−End
Housing−Starter
(Not Serviced
Separately, Order
Starter Motor 693551)
691095 Stud−Rocker Arm
−−−−−− Note −−−−−−
697184 Tube−Dipstick
Used on Type No(s).
0449, 0575, 0635,
0652, 0670.
(Magneto Armature)
337 491055s Plug−Spark
−−−−−− Note −−−−−−
691043 Plug−Spark
Used on Type No(s).
0652.
830
847
526
697088 Screw
842 K691031 Seal−O Ring
(Regulator)
692034 Armature−Starter
697144 Bushing−Governor
Crank
356
358
363
383
385
697089 Wire−Stop
(Dipstick Tube)
790443 Dipstick/Tube
Assembly
544
552
697191 Gasket Set−Engine
19203 Puller−Flywheel
89838s Wrench−Spark Plug
694476 Screw
(Fuel Pump)
690297 Screw
Used on Type No(s).
0036, 0671.
559
697561 Screw
(Remote Choke Stop)
Used on Type No(s).
0652.
−−−−−− Note −−−−−−
790442 Dipstick/Tube
Assembly
Used on Type No(s).
0449, 0575, 0635,
0652, 0670.
385A
(Fuel Pump)
559A
693675 Screw
387
387A
404
697090 Pump−Fuel
808656 Pump−Fuel
691691 Washer
(Remote Choke Stop)
Used on Type No(s).
0652.
(Governor Crank)
K Included in Engine Gasket Set−Ref. No.358.
D Included in Carburetor Overhaul Kit−Ref. No. 121A.
∆ Included in Valve Gasket Set−Ref. No 1095.
Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.
3673−9
Assemblies include all parts shown in frames.
10/23/2006
9
31P900
REF.
NO.
PART
NO.
REF.
NO.
PART
NO.
REF.
NO.
PART
NO.
DESCRIPTION
DESCRIPTION
DESCRIPTION
851
692424 Terminal−Spark Plug
1023
1024
1026
791079 Cover−Rocker
499054 Pump−Oil
692003 Rod−Push
(Intake)
1070
690372 Screw
(Flywheel Fan)
691293 Retainer−Brush
691333 Cap−Limiter
690190 Gasket Set−Valve
691183 Screw
(Alternator)
695407 Screw
(Float Bowl)
697124 Reed−Breather
697104 Screw
868 K∆690968 Seal−Valve
877
1090
1091
1095
1119
393456 Wire/Connector−
Alternator
(Dual Circuit)
393537 Wire/Connector−
Alternator
(Tri Circuit)
398661 Harness−Alternator
(Dual Circuit)
691955 Harness−Alternator
(Tri Circuit)
691108 Screw
−−−−−− Note −−−−−−
692011 Rod−Push
(Exhaust)
877B
1027 492932s Filter−Oil
Used on Type No(s).
1127
878
878A
914
0449, 0575, 0652,
0671.
696854 Filter−Oil
1263
1264
1027A
(Breather Reed)
Used on Type No(s).
0036, 0635, 0670.
1266 KD691917 Seal−O Ring
(Intake Elbow)
(Rocker Cover)
791851 Hose−Vacuum
943 K690589 Seal−O Ring
(Oil Pump Cover)
1029
1034
1035
1036
691751 Arm−Rocker
Used on Type No(s).
690822 Guide−Push Rod
693784 Shaft−Pump
Label−Emissions
0652.
1266A D697123 Seal−O Ring
(Intake Elbow)
918
(Available from an
Authorized Briggs &
Stratton Service
Used on Type No(s).
0652.
697419 Latch−Blower Housing
(Black)
697156 Plug−AVS
Counterweight
947A
965
967
699915 Solenoid−Fuel
499613 Cover−Oil Pump
697015 Filter−Pre Cleaner
698403 Cover−Air Cleaner
(Black)
1267
1270
1330
Dealer)
968
1040B
1044
699852 Plate−Trim
698139 Screw
975A
699502 Bowl−Float
(Flywheel)
272147 Repair Manual
987A D698777 Seal−Throttle Shaft
1051
1054
1058
1059
691265 Ring−Retaining
280275 Tie−Cable
276344 Operator’s Manual
698516 Kit−Screw/Washer
1005
1017
699043 Fan−Flywheel
690770 Screen−Oil Pump
1022K∆272475s Gasket−Rocker Cover
K Included in Engine Gasket Set−Ref. No.358.
D Included in Carburetor Overhaul Kit−Ref. No. 121A.
∆ Included in Valve Gasket Set−Ref. No 1095.
Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.
3673−10
Assemblies include all parts shown in frames.
10/23/2006
10
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