Briggs & Stratton 31N800 Series Setup guide

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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,
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PRINTED IN U.S.A.
FORM MS−3593−10/30/2007
REPLACES FORM MS−3593−06/11/2007
FILE IN SECT. 2 OF SERVICE MANUAL
31N800
Illustrated Parts List
Model Series
31N800
TYPE NUMBERS
.0440.
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 5. . . . . . . . . . . . . . . . . . . . . . . . .
Gasket Set −Engine 2. . . . . . . . . . . . . . . . .
Gasket Set −Valve 3. . . . . . . . . . . . . . . . . .
Governor Spring 7. . . . . . . . . . . . . . . . . . . .
Ignition 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Kit −Carburetor Overhaul 4. . . . . . . . . . . .
Lubrication 3. . . . . . . . . . . . . . . . . . . . . . . . .
Operator’s Manual 2. . . . . . . . . . . . . . . . . .
Piston, Rings, Connecting Rod 2. . . . . . .
Valves 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warning Label 2. . . . . . . . . . . . . . . . . . . . . .

31N800
Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.
3593−2Assemblies include all parts shown in frames. 10/30/2007
2
29 32
307
306
718
3
22
15
1
2
24
691
552
10
358 ENGINE GASKET SET
11
584
9
1263
1264
43
1270
758
759
757
524
1022
12
9
7
3
868
842
691
51
20
617
27
28
26
27
25
741
146
12
20
4
16
46 24
45
1058 OPERATOR’S MANUAL 1319 WARNING LABEL
REQUIRED when replacing parts
with warning labels affixed.
850

31N800
Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.
3593−3Assemblies include all parts shown in frames. 10/30/2007
3
51
617
50
617
830
1034
1022
51
7
238 36
868
1029
33
534
192
35
53
54
45
383
337
635
1026
13
1022
1023
914
1022
868
51
1095 VALVE GASKET SET
7
654
847
523
842
525
524
42
42
850A

31N800
Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.
3593−4Assemblies include all parts shown in frames. 10/30/2007
4
385
387 385A
387A
918
601
240A
187B
601
105A
51
634B
987A
95A
130A
NIKKI
98A
94A
117A
141B
131A
127A
108B
118A
135
137A
104A
133A
1127
975A
947A
276A
137A
121A CARBURETOR OVERHAUL KIT
95A
104A
105A
127A
987A
634B
51
137A
617
125A

31N800
Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.
3593−5Assemblies include all parts shown in frames. 10/30/2007
5
1267
967
305
643
968
304
305A
1036 EMISSIONS LABEL
1040
445

31N800
Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.
3593−6Assemblies include all parts shown in frames. 10/30/2007
6
37
78
783
1051
23
1070
363 1044
1005
1005A
415A
1070A
73
74
73A
1005B

31N800
Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.
3593−7Assemblies include all parts shown in frames. 10/30/2007
7
878A
474B
877B
TRI
CIRCUIT
1059
501
526
356
851
334
333
1054
216 202
232
268
269
271
270
267
265
209
222
188
616
404
614
562
505
227
697
729A
1051
510
513
783
802
462
579
503
310
803
544
801
309
1090 311
797
789A
521
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.
559

REF. PART REF. PART REF. PART
NO. NO. DESCRIPTION NO. NO. DESCRIPTION NO. NO. DESCRIPTION
31N800
KIncluded in Engine Gasket Set−Ref. No.358.
DIncluded in Carburetor Overhaul Kit−Ref. No. 121A.
ΔIncluded 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.
3593−8Assemblies include all parts shown in frames. 10/30/2007
8
1 793987 Cylinder Assembly
2 399265 Kit−Bushing/Seal
(Magneto Side)
3K391086s Seal−Oil
(Magneto Side)
4 697106 Sump−Engine
5 793989 Head−Cylinder
7KΔ699168 Gasket−Cylinder Head
9K697109 Gasket−Breather
(Used Before Code
Date 07072400).
10 697157 Screw
(Breather Assembly)
11 794683 Tube−Breather
(Used After Code Date
07071800).
−−−−−− Note −−−−−−
697113 Tube−Breather
(Used Before Code
Date 07071900).
12 K697110 Gasket−Crankcase
(.015”Thick)(Standard)
13 793988 Screw
(Cylinder Head)
(Used After Code Date
07011400).
−−−−−− Note −−−−−−
690360 Screw
(Cylinder Head)
(Used Before Code
Date 07011500).
(Cylinder Head)
15 690946 Plug−Oil Drain
(Square Head)
16 697127 Crankshaft
20 K791892 Seal−Oil
(PTO Side)
22 692125 Screw
(Crankcase
Cover/Sump)
23 693556 Flywheel
24 222698s Key−Flywheel
25 791937 Piston Assembly
(Standard)
−−−−−− Note −−−−−−
793019 Piston
Assembly
(.020 Oversize)
26 791936 Ring Set
(Standard)
−−−−−− Note −−−−−−
792649 Ring Set
(.020 Oversize)
27 698469 Lock−Piston Pin
28 697099 Pin−Piston
(Standard)
29 791631 Rod−Connecting
(Standard)
33 791934 Valve−Exhaust
34 791935 Valve−Intake
35 691279 Spring−Valve
(Intake)
36 691279 Spring−Valve
(Exhaust)
37 697352 Guard−Flywheel
42 499586 Keeper−Valve
43 691968 Slinger−Governor/Oil
45 690564 Tappet−Valve
46 793880 Camshaft
50 690193 Manifold−Intake
51KΔD692137 Gasket−Intake
53 690227 Stud
(Carburetor)
54 691148 Screw
(Intake Manifold)
73 Screen−Rotating
(Service With Flywheel
Fan 794436)
(Used Before Code
Date 07040900).
73A 794437 Screen−Rotating
(Used After Code Date
07040800).
74 697897 Screw
(Rotating Screen)
(Used Before Code
Date 07040900).
78 691003 Screw
(Flywheel Guard)
94A 695425 Kit−Idle Mixture
95A D690718 Screw
(Throttle Valve)
98A 695408 Kit−Idle Speed
104A D694918 Pin−Float Hinge
105A D696136 Valve−Float Needle
108B 695419 Valve−Choke
117A 699732 Jet−Main
(Standard)
118A 843099 Jet−Main
(High Altitude)
121A 792369 Kit−Carburetor
Overhaul
(Nikki Carburetor)
125A 792171 Carburetor
(Nikki Carburetor)
127A D690727 Plug−Welch
130A 699500 Valve−Throttle
131A 699501 Kit−Throttle Shaft
133A 694914 Float−Carburetor
135 792022 Tube−Fuel Transfer
137A D698781 Gasket−Float Bowl
141B 698778 Kit−Choke Shaft
146 691639 Key−Timing
187B 791805 Line−Fuel
(Formed)(10−1/4
Inches Long)(Cut to
Required Length)
188 691693 Screw
(Control Bracket)
192 691986 Adjuster−Rocker Arm
202 691841 Link−Mechanical
Governor
209 692208 Spring−Governor
216 691840 Link−Choke
222 694042 Bracket−Control
227 691374 Lever−Governor
Control
232 691842 Spring−Governor Link
238 691843 Cap−Valve
240A 691035 Filter−Fuel
(Includes Paper
Element With A 40
Micron Rating)
265 691024 Clamp−Casing
267 792629 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
304 790929 Housing−Blower
(Red)
305 697102 Screw
(Blower Housing)
305A 793376 Screw
(Blower Housing)(Lift
Screw)

REF. PART REF. PART REF. PART
NO. NO. DESCRIPTION NO. NO. DESCRIPTION NO. NO. DESCRIPTION
31N800
KIncluded in Engine Gasket Set−Ref. No.358.
DIncluded in Carburetor Overhaul Kit−Ref. No. 121A.
ΔIncluded 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.
3593−9Assemblies include all parts shown in frames. 10/30/2007
9
306 697107 Shield−Cylinder
307 691003 Screw
(Cylinder Shield)
309 693551 Motor−Starter
310 690323 Screw
(Starter Motor)
311 497608 Brush Set
333 795315 Armature−Magneto
334 691061 Screw
(Magneto Armature)
337 491055S Plug−Spark
356 697089 Wire−Stop
358 794150 Gasket Set−Engine
363 19203 Puller−Flywheel
383 89838S Wrench−Spark Plug
385 694476 Screw
(Fuel Pump)
385A 690297 Screw
(Fuel Pump)
387 697090 Pump−Fuel
387A 808656 Pump−Fuel
404 691691 Washer
(Governor Crank)
415A 794129 Plug
(Cover/Retainer)
(Used After Code Date
07040800).
445 698083 Filter−Air Cleaner
Cartridge
(Non Washable)
462 691261 Washer
(Starter Cable)
474B 696457 Alternator
(Tri Circuit)
501 691188 Regulator
503 691532 Strap−Starter
505 691251 Nut
(Governor Control
Lever)
510 693699 Drive−Starter
513 692024 Clutch−Drive
521 690581 Shield−Cable
523 699908 Dipstick
524 K691032 Seal−Dipstick Tube
525 697085 Tube−Dipstick
526 697088 Screw
(Regulator)
544 692034 Armature−Starter
552 697144 Bushing−Governor
Crank
559 697561 Screw
(Remote Choke Stop)
562 691119 Bolt
(Governor Control
Lever)
579 691029 Nut
(Starter Cable)
584 794682 Cover−Breather
Passage
(Used After Code Date
07071800).
−−−−−− Note −−−−−−
697112 Cover−
Breather Passage
(Used Before Code
Date 07071900).
601 791850 Clamp−Hose
614 691620 Pin−Cotter
616 692012 Crank−Governor
617 KD692138 Seal−O Ring
(Intake Manifold)
634B D698779 Spring/Seal Assembly
635 691909 Boot−Spark Plug
643 698401 Retainer−Air Filter
654 690958 Nut
(Carburetor)
691 K692407 Seal−Governor Shaft
697 690372 Screw
(Drive Cap)
718 690959 Pin−Locating
729A 691224 Clip−Wire
741 697128 Gear−Timing
757 793242 Link−Counterweight
758 793763 Counterweight
759 697392 Pin−Counterweight
783 693713 Gear−Pinion
789A 698329 Harness−Wiring
797 693167 Nut
(Brush Retainer)
801 691283 Cap−Drive
802 691286 Cap−End
803 Housing−Starter
(Not Serviced
Separately, Order
Starter Motor 693551)
830 691095 Stud−Rocker Arm
842 K691031 Seal−O Ring
(Dipstick Tube)
847 790443 Dipstick/Tube
Assembly
850 100100 Sealant−Liquid
(Breather)
(Used After Code Date
07071800).
850A 100100 Sealant−Liquid
(Rocker Cover)
(Used After Code Date
07091000).
851 692424 Terminal−Spark Plug
868 KΔ690968 Seal−Valve
877B 393537 Wire/Connector−
Alternator
878A 691955 Harness−Alternator
914 691108 Screw
(Rocker Cover)
918 791851 Hose−Vacuum
947A 699915 Solenoid−Fuel
967 697015 Filter−Pre Cleaner
968 699830 Cover−Air Cleaner
(Red)
975A 699502 Bowl−Float
987A D698777 Seal−Throttle Shaft
1005 794438 Fan−Flywheel
(Used After Code Date
07040800).
1005A 794436 Fan−Flywheel
(Used Before Code
Date 07040900).
1005B Fan−Flywheel
(No Longer Available)
(See Reference1005A
For Service Flywheel
Fan).
1022KΔ272475s Gasket−Rocker Cover
(Used Before Code
Date 07091100).
1023 791079 Cover−Rocker
1026 692003 Rod−Push
(Intake)
−−−−−− Note −−−−−−
692011 Rod−Push
(Exhaust)
1029 691751 Arm−Rocker
1034 690822 Guide−Push Rod
1036 Label−Emissions
(Available From A
Briggs & Stratton
Authorized Dealer)
1040 698368 Plate−Trim
1044 698139 Screw
(Flywheel)
1051 691265 Ring−Retaining
1054 280275 Tie−Cable
1058 276344 Operator’s Manual
1059 698516 Kit−Screw/Washer
1070 690372 Screw
(Flywheel Fan)
(Used Before Code
Date 07040900).

REF. PART REF. PART REF. PART
NO. NO. DESCRIPTION NO. NO. DESCRIPTION NO. NO. DESCRIPTION
31N800
KIncluded in Engine Gasket Set−Ref. No.358.
DIncluded in Carburetor Overhaul Kit−Ref. No. 121A.
ΔIncluded 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.
3593−10 Assemblies include all parts shown in frames. 10/30/2007
10
1070A 690363 Screw
(Used After Code Date
07040800).
1090 691293 Retainer−Brush
1095 690190 Gasket Set−Valve
1119 691183 Screw
(Alternator)
1127 695407 Screw
(Float Bowl)
1263 697124 Reed−Breather
1264 697104 Screw
(Breather Reed)
1267 697424 Latch−Blower Housing
(Red)
1270 697156 Plug−AVS
Counterweight
1319 794467 Label−Warningl