Briggs & Stratton 12J800 Series Setup guide

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PRINTED IN U.S.A.
FORM MS−0991−11/30/2007
REPLACES FORM MS−0991−10/31/2007
FILE IN SECT. 2 OF SERVICE MANUAL
12J800
Illustrated Parts List
Model Series
12J800
TYPE NUMBERS
0628 through 6699.
TABLE OF CONTENTS
Alternator 8. . . . . . . . . . . . . . . . . . . . . . . . . .
Air Cleaner 4. . . . . . . . . . . . . . . . . . . . . . . . .
Blower Housing/Shrouds 6. . . . . . . . . . . .
Camshaft 2. . . . . . . . . . . . . . . . . . . . . . . . . . .
Carburetor 3. . . . . . . . . . . . . . . . . . . . . . . . .
Controls 5. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Crankshaft 2. . . . . . . . . . . . . . . . . . . . . . . . .
Cylinder 2. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electric Starter 8. . . . . . . . . . . . . . . . . . . . . .
Electrical 8. . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Sump 2. . . . . . . . . . . . . . . . . . . . . . .
Exhaust System 4. . . . . . . . . . . . . . . . . . . .
Flywheel 7. . . . . . . . . . . . . . . . . . . . . . . . . . .
Flywheel Brake 8. . . . . . . . . . . . . . . . . . . . .
Fuel Supply 5. . . . . . . . . . . . . . . . . . . . . . . .
Governor Spring 5. . . . . . . . . . . . . . . . . . . .
Ignition 8. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Kits/Gaskets 2 & 3. . . . . . . . . . . . . . . . . . . . . . . .
Lubrication 2. . . . . . . . . . . . . . . . . . . . . . . .
Piston Group 2. . . . . . . . . . . . . . . . . . . . . . .
Rewind Starter 7. . . . . . . . . . . . . . . . . . . . . .
Valves 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

12J800
Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.
0991−2Assemblies include all parts shown in frames. 11/30/2007
2
10
3
128
9
718
307
306
383
635
337
13 5
7
51
54
50
11
33
36
40
15A
20A
20
15
22
20
15
12
12
4A
4
847
523
287
524
525
842
9
883
1095 VALVE GASKET SET
7
45
34
35
40 45
12
9
7
3
358 ENGINE GASKET SET
883
842
617
524
163
51
20
20A
585
668
32
32A
27
26
27
25
29
28
83
743
101
721
715
24
146
741
357A
16
43
46
374
46A
374
870
869
871
684
585
584
635A
868
1019 LABEL KIT
1330 REPAIR MANUAL
1058 OPERATOR’S MANUAL
1319 WARNING LABEL
REQUIRED when replacing parts
with warning labels affixed.

12J800
Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.
0991−3Assemblies include all parts shown in frames. 11/30/2007
3
97
117
975
133
134
94
98
617
95
130
130A
633
127A
163
276
137
104
365
276
118 276
94 134
97
975
133
134
125
94
98
CHOKE SYSTEM
PRIMER SYSTEM
108
633
217
692
217
617
95
130
130A
633
127
163
276
137
104
365
276 276
125A
109
127
121 CARBURETOR OVERHAUL KIT
977 CARBURETOR GASKET SET
163
137 276
104
127
137
163
633
617
276
617
633
127A
117A118A

12J800
Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.
0991−4Assemblies include all parts shown in frames. 11/30/2007
4
346
677
836
613
81
883
163
529
970
159
443A
445A
967A
968B
425A
966A
976
300 300A
676
832B
300B
994
613A
81
613B
81
836B
832D
836B
836

12J800
Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.
0991−5Assemblies include all parts shown in frames. 11/30/2007
5
670
190
930
240
209
616
404
615
505
562
202
188843
265
267
270
271
268
621
227
98A
222 222B222A
668
621
668
668
601
269
265A
267
187C187 187B187A
601
601A
601
601
972 972B
1059
957A
957A
957B
957B
222D
668
222C
621
668

12J800
Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.
0991−6Assemblies include all parts shown in frames. 11/30/2007
6
930A
930
921E
969
604A
564A
921B
969A
921
564
604
925
305
304
78
37
1036 EMISSIONS LABEL
921A
921C
969A
969
969A
921K
969A
969A
921H

12J800
Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.
0991−7Assemblies include all parts shown in frames. 11/30/2007
7
73
455
101A
1134
276A
57
678 60
58
592
65
597
456
689
459
1210
1211
55
455A
363
23A
73
455
332
608
60B
608A
459A
144
946
59A
55A
689A
456A
592
65
58
1005

12J800
Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.
0991−8Assemblies include all parts shown in frames. 11/30/2007
8
621
922
745
236
923
990A
1160
851
334
910
474
1119
578
356
935
333
356A
789B789A
1236
1009
990
664
500
892
356C
334
851A
635A
333A
310
802
853
803
544
801
783A
651
513
785
784
783
937
742
309
545
510
853
697
783A
651
513
785
784
783
937
742
510
309A

12J800
Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.
0991−9Assemblies include all parts shown in frames. 11/30/2007
9
1 697324 Cylinder Assembly
2 399269 Kit−Bushing/Seal
(Magneto Side)
3K299819S Seal−Oil
(Magneto Side)
4 493279 Sump−Engine
−−−−−−− Note −−−−−
696294 Sump−Engine
Used on Type No(s).
2327, 2328, 2329.
4A 493365 Sump−Engine
(Auxiliary PTO)
5 691160 Head−Cylinder
7K∅692249 Gasket−Cylinder Head
8 695250 Breather Assembly
9K∅699833 Gasket−Breather
10 691125 Screw
(Breather Assembly)
11 691781 Tube−Breather
12 K692232 Gasket−Crankcase
13 690912 Screw
(Cylinder Head)
15 691680 Plug−Oil Drain
(Square Socket)
15A 691093 Plug−Oil Drain
(Hex Socket)
16 691451 Crankshaft
(Used After Code Date
97011200).
−−−−−−− Note −−−−−
694442 Crankshaft
(Used Before Code
Date 97011300).
691450 Crankshaft
(Used After Code Date
97011200).
Used on Type No(s).
0653, 0818, 0819,
0825, 0881, 1324,
1328, 1330, 1331,
1337, 1363, 1367,
1370, 1371, 1522,
1528, 1535, 1787,
1918, 1919, 1936,
2372, 2628, 2635,
2825, 2919, 2925,
3113, 3114, 3131.
694440 Crankshaft
(Used Before Code
Date 97011300).
Used on Type No(s).
1522, 1528, 1535,
2825.
692978 Crankshaft
(Used After Code Date
97011200).
Used on Type No(s).
0652, 0861, 1961,
1968, 1978.
690793 Crankshaft
(Used Before Code
Date 97011300).
Used on Type No(s).
0861, 1961.
693017 Crankshaft
(Used After Code Date
97011200).
Used on Type No(s).
2824.
694441 Crankshaft
(Used Before Code
Date 97011300).
Used on Type No(s).
2824.
691452 Crankshaft
(Used After Code Date
97011200).
Used on Type No(s).
0874, 0875, 1120,
1122, 1123, 1166,
1366, 1567, 1753,
1754, 1755, 1904,
1905, 1917, 1925,
1927, 1929, 1974,
2322, 2325, 2326,
2327, 2328, 2329,
2330, 2366, 2367,
2371, 2636, 2816,
2916, 3104, 3136.
694059 Crankshaft
(Used Before Code
Date 97011300).
Used on Type No(s).
0875, 1120, 1166,
2816.
691454 Crankshaft
(Used After Code Date
97011200).
Used on Type No(s).
0878, 1338, 2826,
2926.
692000 Crankshaft
(Used Before Code
Date 97011300).
Used on Type No(s).
2826.
691455 Crankshaft
(Used After Code Date
97011200).
Used on Type No(s).
1966, 2818, 2918,
3125.
691375 Crankshaft
(Used Before Code
Date 97011300).
Used on Type No(s).
2818.
694079 Crankshaft
Used on Type No(s).
2368.
696337 Crankshaft
Used on Type No(s).
1753.
696009 Crankshaft
Used on Type No(s).
2369, 2370.
KIncluded in Engine Gasket Set−Ref. No.358.
DIncluded in Carburetor Overhaul Kit−Ref. No. 121.
zIncluded in Carburetor Gasket Set−Ref. No. 977.
∅Included in Valve Gasket Set−Ref. No 1095.
REF. PART REF. PART REF. PART
NO. NO. DESCRIPTION NO. NO. DESCRIPTION NO. NO. DESCRIPTION

12J800
Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.
0991−10 Assemblies include all parts shown in frames. 11/30/2007
10
20 K399781S Seal−Oil
(PTO Side)
20A K691952 Seal−Oil
(PTO Side)
(Auxiliary PTO)
22 691092 Screw
(Crankcase Cover/
Sump)
23A 691987 Flywheel
−−−−−−− Note −−−−−
691992 Flywheel
Used on Type No(s).
0826, 0873, 0874,
1552, 1567, 1753,
1925, 1931, 1934,
1973, 1974, 2805,
2905, 2935, 4961.
696291 Flywheel
Used on Type No(s).
2327, 2328, 2329.
24 222698S Key−Flywheel
25 795429 Piston Assembly
(Standard)
(Used After Code Date
07090300).
−−−−−−− Note −−−−−
791096 Piston
Assembly
(Used After Code Date
04031400 and Before
Code Date 07090400).
494058 Piston
Assembly
(Standard)
(Used Before Code
Date 97011300).
795430 Piston
Assembly
(.020” Oversize)
(Used After Code Date
07090300).
791325 Piston
Assembly
(.020” Oversize)
(Used After Code Date
04102100 and Before
Code Date 07040400).
494060 Piston
Assembly
(.020” Oversize)
(Used Before Code
Date 97011300).
26 795431 Ring Set
(Standard)
(Used After Code Date
07090300).
−−−−−−− Note −−−−−
791098 Ring Set
(Standard)
(Used After Code Date
04031400 and Before
Code Date 07090400).
499425 Ring Set
(Standard)
(Used After Code Date
97011200 and Before
Code Date 04031500).
493261 Ring Set
(Standard)
(Used Before Code
Date 97011300).
795432 Ring Set
(.020” Oversize)
(Used After Code Date
07090300).
791324 Ring Set
(.020” Oversize)
(Used After Code Date
04102100 and Before
Code Date 07090400).
499427 Ring Set
(.020” Oversize)
(Used After Code Date
97011200 and Before
Code Date 04102200).
493389 Ring Set
(.020” Oversize)
(Used Before Code
Date 97011300).
493390 Ring Set
(.030” Oversize)
(Used Before Code
Date 97011300).
27 691866 Lock−Piston Pin
(Used After Code Date
97011200).
−−−−−−− Note −−−−−
691588 Lock−Piston
Pin
(Used Before Code
Date 97011300).
28 499423 Pin−Piston
(Standard)
(Used After Code Date
97011200).
−−−−−−− Note −−−−−
298909 Pin−Piston
(Standard)
(Used Before Code
Date 97011300).
298908 Pin−Piston
(.005” Oversize)
(Used Before Code
Date 97011300).
29 499424 Rod−Connecting
(Standard)
(Used After Code Date
97011200).
−−−−−−− Note −−−−−
490566 Rod−
Connecting
(Standard)
(Used Before Code
Date 97011300).
32 691664 Screw
(Connecting Rod)
32A 695759 Screw
(Connecting Rod)
(Used After Code Date
00042200).
33 262651S Valve−Exhaust
34 262652S Valve−Intake
35 691270 Spring−Valve
(Intake)
36 691270 Spring−Valve
(Exhaust)
37 694086 Guard−Flywheel
40 692194 Retainer−Valve
43 691997 Slinger−Governor/Oil
45 690548 Tappet−Valve
KIncluded in Engine Gasket Set−Ref. No.358.
DIncluded in Carburetor Overhaul Kit−Ref. No. 121.
zIncluded in Carburetor Gasket Set−Ref. No. 977.
∅Included in Valve Gasket Set−Ref. No 1095.
REF. PART REF. PART REF. PART
NO. NO. DESCRIPTION NO. NO. DESCRIPTION NO. NO. DESCRIPTION