Briggs & Stratton 125600 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,
recording or by any information storage and retrieval system, without permission
in writing from Briggs & Stratton Corporation.
PRINTED IN U.S.A.
FORM MS−6537−05/28/2008
REPLACES FORM MS−6537−04/02/2008
FILE IN SECT. 2 OF SERVICE MANUAL
125600
Illustrated Parts List
Model Series
125600
TYPE NUMBERS
0100 through 0165.
TABLE OF CONTENTS
Air Cleaner 6. . . . . . . . . . . . . . . . . . . . . . . . .
Blower Housing/Shrouds 7. . . . . . . . . . . .
Camshaft 2. . . . . . . . . . . . . . . . . . . . . . . . . . .
Carburetor 4. . . . . . . . . . . . . . . . . . . . . . . . .
Controls 5. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Crankshaft 2. . . . . . . . . . . . . . . . . . . . . . . . .
Cylinder 2. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cylinder Head 3. . . . . . . . . . . . . . . . . . . . . .
Electric Starter 7. . . . . . . . . . . . . . . . . . . . . .
Engine Sump 2. . . . . . . . . . . . . . . . . . . . . . .
Exhaust System 6. . . . . . . . . . . . . . . . . . . .
Flywheel 7. . . . . . . . . . . . . . . . . . . . . . . . . . .
Flywheel Brake 5. . . . . . . . . . . . . . . . . . . . .
Fuel Supply 4. . . . . . . . . . . . . . . . . . . . . . . .
Governor Spring 5. . . . . . . . . . . . . . . . . . . .
Ignition 5. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Kits/Gaskets Sets 8. . . . . . . . . . . . . . . . . .
Lubrication 2. . . . . . . . . . . . . . . . . . . . . . . .
Piston Group 2. . . . . . . . . . . . . . . . . . . . . . .
Rewind Starter 7. . . . . . . . . . . . . . . . . . . . . .

125600
Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.
6537−2Assemblies include all parts shown in frames. 05/28/2008
2
1019 LABEL KIT
11
584
585
684
3
1
2
306
307
718 8
9
10
32
32A
29
28 27
27
26
25
24
357
741
146
16
46
43
46A 46B
43A
374
374
1055
12
17
15 20
15
20
15
20
12
12
15A
20A
4A 4B4
22
715
721
101
743
83
847
287
525
523
524
842
1055
737
1027
988
1028
1024 965 943
750
1330 REPAIR MANUAL
1058 OPERATOR’S MANUAL 1319 WARNING LABEL
REQUIRED when replacing parts
with warning labels affixed.

125600
Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.
6537−3Assemblies include all parts shown in frames. 05/28/2008
3
1023
1022
914
1022
122
51
883
718
619
1034
40
868
40
33
34
7
993
886
36
35
238
1029
830
192
45
1026
13
635
337
383
5
51A
51B

125600
Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.
6537−4Assemblies include all parts shown in frames. 05/28/2008
4
PRIMER SYSTEM
97
633A
51
95
130
127
163A
122
276
137
104
125
134
133
975
276
117
276
118
365
190
972
957
1059
187
958
670
601
601A
51B
122A
957B
957B

125600
Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.
6537−5Assemblies include all parts shown in frames. 05/28/2008
5
843
188
202
267
265
265A
271
269
268
270
564
604
227 562
505
615
404
616
209A
333
851
334
356
745
922
621
923
621
51
222A
51A 51B
122 51
222B
51A 51B
578
1119A
474A
356B
789A

125600
Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.
6537−6Assemblies include all parts shown in frames. 05/28/2008
6
425
968
445
967
443 443A
529A
163A
976
966
300 613
883
613A
836
836A
836
832
832C
677
677
676
676C
836A
883
613
613A
300B

125600
Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.
6537−7Assemblies include all parts shown in frames. 05/28/2008
7
930 930A
332
455
73
1005
363
23
37
78
305
65
592
925
304
608
55 65
592
1211
1210
58
60
459
689
456
597
969
921B
969A
1036 EMISSIONS LABEL
309 510 742
937
783
784
785
513
651
783A
801
544
697
803 310
802
853
545
853
697
783A
651
513
785
784
783
937
742
510
309A

125600
Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.
6537−8Assemblies include all parts shown in frames. 05/28/2008
8
3
9
12
20
20A
1022
122
51
883
868
7
993
524
842
163A
585
1022
122
51
883
868
7
993
1095 VALVE GASKET SET
358 ENGINE GASKET SET
122
51
163A
633A
137
104
134
276
127
122
51
163A
633A
137
276
977 CARBURETOR GASKET SET
51A
51B
51A
51B
51A
51B
51A
51B
121 CARBURETOR OVERHAUL KIT

125600
Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.
6537−9Assemblies include all parts shown in frames. 05/28/2008
9
1 790363 Cylinder Assembly
(Used After Code Date
04040400).
−−−−−−− Note −−−−−
499678 Cylinder−
Assembly
(Used Before Code
Date 04040500).
2 399269 Kit−Bushing/Seal
(Magneto Side)
3K299819S Seal−Oil
(Magneto Side)
4 493279 Sump−Engine
4A 493365 Sump−Engine
(Auxiliary PTO)
4B 692509 Sump−Engine
5 795501 Head−Cylinder
(Used After Code Date
05110100).
−−−−−−− Note −−−−−
695276 Head−Cylinder
(Used Before Code
Date 05110200).
7KΔ695166 Gasket−Cylinder Head
8 495786 Breather Assembly
9K699833 Gasket−Breather
10 691125 Screw
(Breather Assembly)
11 499675 Tube−Breather
12 K692232 Gasket−Crankcase
13 691137 Screw
(Cylinder Head)
15 691680 Plug−Oil Drain
(Square Socket)
15A 691093 Plug
(Hex Socket)
16 691457 Crankshaft
−−−−−−− Note −−−−−
693291 Crankshaft
Used on Type No(s).
0117, 0158, 0163.
692823 Crankshaft
Used on Type No(s).
0121.
692716 Crankshaft
Used on Type No(s).
0126, 0127.
691456 Crankshaft
Used on Type No(s).
0100, 0105, 0114,
0119, 0124, 0136,
0144, 0145, 0146,
0149, 0159, 0162,
0164.
17 692517 Bearing−Ball
20 K399781S Seal−Oil
(PTO Side)
20A K691952 Seal−Oil
(PTO Side)
(Auxiliary PTO)
22 691092 Screw
(Crankcase
Cover/Sump)
23 697610 Flywheel
−−−−−−− Note −−−−−
692693 Flywheel
Used on Type No(s).
0127, 0130, 0133,
0140.
692987 Flywheel
Used on Type No(s).
0121.
697637 Flywheel
Used on Type No(s).
0148.
24 222698S Key−Flywheel
25 795429 Piston Assembly
(Standard)
(Used After Code Date
07090300).
−−−−−−− Note −−−−−
792004 Piston
Assembly
(Standard)
(Used Before Code
Date 07090400).
795430 Piston
Assembly
(.020” Oversize)
(Used After Code Date
07090300).
791325 Piston
Assembly
(.020” Oversize)
(Used Before Code
Date 07090400).
26 795431 Ring Set
(Standard)
(Used After Code Date
07090300).
−−−−−−− Note −−−−−
791969 Ring Set
(Standard)
(Used After Code Date
05030700 and Before
Code Date 07090400).
499631 Ring Set
(Standard)
(Used Before Code
Date 05030800).
795432 Ring Set
(.020” Oversize)
(Used After Code Date
07090300).
791324 Ring Set
(.020” Oversize)
(Used After Code Date
05030700 and Before
Code Date 07090400).
692786 Ring Set
(.020” Oversize)
(Used Before Code
Date 05030800).
KIncluded in Engine Gasket Set−Ref. No.358.
DIncluded in Carburetor Overhaul Kit−Ref. No. 121.
zIncluded in Carburetor Gasket Set−Ref. No. 977.
ΔIncluded in Valve Gasket Set−Ref. No 1095.
REF. PART REF. PART REF. PART
NO. NO. DESCRIPTION NO. NO. DESCRIPTION NO. NO. DESCRIPTION

125600
Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.
6537−10 Assemblies include all parts shown in frames. 05/28/2008
10
27 691866 Lock−Piston Pin
28 499423 Pin−Piston
29 499424 Rod−Connecting
32 691664 Screw
(Connecting Rod)
32A 695759 Screw
(Connecting Rod)
(Used After Code Date
00042200).
33 499642 Valve−Exhaust
34 499641 Valve−Intake
35 691304 Spring−Valve
(Intake)
36 691304 Spring−Valve
(Exhaust)
37 694086 Guard−Flywheel
40 692194 Retainer−Valve
43 691997 Slinger−Governor/Oil
43A 692505 Slinger−Governor/Oil
Used on Type No(s).
0142.
45 690977 Tappet−Valve
46 694039 Camshaft
46A 694037 Camshaft
(Counterclockwise)
46B 694040 Camshaft
Used on Type No(s).
0142.
51KzDΔ692668 Gasket−Intake
51AKzDΔ697735 Gasket−Intake
51BKzDΔ692555 Gasket−Intake
55 691421 Housing−Rewind
Starter
58 697316 Rope−Starter
(Cut To Required
Length)
60 281434S Grip−Starter Rope
65 690837 Screw
(Rewind Starter)
73 691222 Screen−Rotating
−−−−−−− Note −−−−−
691221 Screen−
Rotating
Used on Type No(s).
0148.
78 691108 Screw
(Flywheel Guard)
83 691778 Shaft−Auxiliary Drive
−−−−−−− Note −−−−−
690524 Shaft−Auxiliary
Drive
Used on Type No(s).
0112, 0128.
690522 Shaft−Auxiliary
Drive
Used on Type No(s).
0144, 0157.
95 691636 Screw
(Throttle Valve)
97 499682 Shaft−Throttle
(Metal)
−−−−−−− Note −−−−−
790121 Shaft−Throttle
(Plastic)
101 691623 Pin−Shaft
104 D691242 Pin−Float Hinge
117 498981 Jet−Main
(Standard)
(Used After Code Date
03110600).
−−−−−−− Note −−−−−
498978 Jet−Main
(Standard)
(Used Before Code
Date 03110700).
118 497466 Jet−Main
(High Altitude)
(Used After Code Date
03110600).
−−−−−−− Note −−−−−
498975 Jet−Main
(High Altitude)
(Used Before Code
Date 03110700).
121 792383 Kit−Carburetor
Overhaul
122KzDΔ692799 Spacer−Carburetor
122A 792382 Spacer−Carburetor
125 790120 Carburetor
127 D694468 Plug−Welch
130 691203 Valve−Throttle
−−−−−−− Note −−−−−
696564 Valve−Throttle
(Used With Plastic
Throttle Shaft)
133 398187 Float−Carburetor
134 D398188 Kit−Needle/Seat
137 Dz693981 Gasket−Float Bowl
146 690979 Key−Timing
163AKzD692667 Gasket−Air Cleaner
187 791766 Line−Fuel
(Cut to Required
Length)
188 691147 Screw
(Control Bracket)
190 690940 Screw
(Fuel Tank)
192 694543 Adjuster−Rocker Arm
202 691303 Link−Mechanical
Governor
209A 691291 Spring−Governor
−−−−−−− Note −−−−−
691851 Spring−
Governor
Used on Type No(s).
0100, 0117, 0142,
0145, 0147.
690319 Spring−
Governor
Used on Type No(s).
0118, 0133, 0157,
0158.
691292 Spring−
Governor
Used on Type No(s).
0123, 0163.
KIncluded in Engine Gasket Set−Ref. No.358.
DIncluded in Carburetor Overhaul Kit−Ref. No. 121.
zIncluded in Carburetor Gasket Set−Ref. No. 977.
ΔIncluded in Valve Gasket Set−Ref. No 1095.
REF. PART REF. PART REF. PART
NO. NO. DESCRIPTION NO. NO. DESCRIPTION NO. NO. DESCRIPTION

125600
Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.
6537−11 Assemblies include all parts shown in frames. 05/28/2008
11
222A 792402 Bracket−Control
(Used After Code Date
05110100).
−−−−−−− Note −−−−−
693378 Bracket−
Control
(Used Before Code
Date 05110200).
222B 792403 Bracket−Control
(Used After Code Date
05110100).
Used on Type No(s).
0100, 0105, 0118,
0119, 0134, 0142,
0144, 0157, 0158,
0161, 0162, 0164.
−−−−−−− Note −−−−−
692672 Bracket−
Control
(Used Before Code
Date 05110200).
Used on Type No(s).
0100, 0105, 0118,
0119, 0134, 0142,
0144, 0157, 0158,
0161, 0162.
227 691467 Lever−Governor
Control
238 691300 Cap−Valve
265 690798 Clamp−Casing
265A 691024 Clamp−Casing
267 691044 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
276 Dz271716 Washer−Sealing
287 690940 Screw
(Dipstick Tube)
300 694248 Muffler
300B 699769 Muffler
304 499676 Housing−Blower
−−−−−−− Note −−−−−
499677 Housing−
Blower
Used on Type No(s).
0105, 0115, 0119,
0126, 0133, 0134,
0140, 0142, 0144,
0157, 0158, 0161,
0162, 0164.
695976 Housing−
Blower
(Used After Code Date
06081300).
Used on Type No(s).
0123, 0163.
499677 Housing−
Blower
(Used Before Code
Date 06081400).
Used on Type No(s).
0123.
305 691108 Screw
(Blower Housing)
306 691232 Shield−Cylinder
307 690345 Screw
(Cylinder Shield)
309 695550 Motor−Starter
(Used Before Code
Date 07052900).
309A 795092 Motor−Starter
(Used After Code Date
07052800).
310 692327 Bolt
(Starter Motor)
332 690662 Nut
(Flywheel)
333 802574 Armature−Magneto
334 691061 Screw
(Magneto Armature)
337 692051 Plug−Spark
(Resistor)
−−−−−−− Note −−−−−
692720 Plug−Spark
(EMS)
356 692390 Wire−Stop
356B 692151 Wire−Stop
357 692191 Key−Drive Pulley
358 792384 Gasket Set−Engine
363 19069 Puller−Flywheel
365 691129 Screw
(Carburetor)
(Used After Code Date
05110100).
−−−−−−− Note −−−−−
691136 Screw
(Carburetor)
(Used Before Code
Date 05110200).
374 691074 Washer
(Camshaft)
383 19374S Wrench−Spark Plug
404 690272 Washer
(Governor Crank)
425 690670 Screw
(Air Cleaner Cover)
443 692523 Screw
(Air Cleaner Primer
Base)
443A 691637 Screw
(Air Cleaner Primer
Base)
445 491588S Filter−Air Cleaner
Cartridge
455 791960 Cup−Flywheel
456 692299 Plate−Pawl Friction
459 281505S Ratchet−Pawl
474A 695730 Alternator
505 691251 Nut
(Governor Control
Lever)
510 795093 Drive−Starter
513 692358 Clutch−Drive
KIncluded in Engine Gasket Set−Ref. No.358.
DIncluded in Carburetor Overhaul Kit−Ref. No. 121.
zIncluded in Carburetor Gasket Set−Ref. No. 977.
ΔIncluded in Valve Gasket Set−Ref. No 1095.
REF. PART REF. PART REF. PART
NO. NO. DESCRIPTION NO. NO. DESCRIPTION NO. NO. DESCRIPTION

125600
Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.
6537−12 Assemblies include all parts shown in frames. 05/28/2008
12
523 499621 Dipstick
524 K692296 Seal−Dipstick Tube
525 495265 Tube−Dipstick
529A 691923 Grommet
544 690786 Armature−Starter
545 492919 Washer Set
(Starter Motor)
562 691119 Bolt
(Governor Control
Lever)
564 693808 Screw
(Control Cover)
578 398153 Wire Assembly
584 697734 Cover−Breather
Passage
585 K691879 Gasket−Breather
Passage
592 690800 Nut
(Rewind Starter)
597 691696 Screw
(Pawl Friction Plate)
601 791850 Clamp−Hose
601A 691038 Clamp−Hose
604 692669 Cover−Control
608 497680 Starter−Rewind
613 691108 Screw
(Muffler)
613A 691140 Screw
(Muffler)
615 690340 Retainer−Governor
Shaft
616 698801 Crank−Governor
619 691108 Screw
(Cylinder Head Plate)
621 692310 Switch−Stop
633ADz691321 Seal−Choke/Throttle
Shaft
635 66538S Boot−Spark Plug
651 690345 Screw
(Starter Gear Cover)
670 692294 Spacer−Fuel Tank
676 397931 Deflector−Muffler
676C 497682 Deflector−Muffler
677 690661 Screw
(Muffler Deflector)
684 690345 Screw
(Breather Passage
Cover)
689 691855 Spring−Friction
697 691127 Screw
(Drive Cap)
715 691147 Screw
(Stop Shaft)
718 690959 Pin−Locating
721 690449 Shaft−Stop
737 692511 Screw
(Oil Filter Adapter)
741 794388 Gear−Timing
(Use Without Woodruff
Key)
(Used After Code Date
07093000).
−−−−−−− Note −−−−−
790345 Gear−Timing
(Use Without Woodruff
Key)
(Used Before Code
Date 07100100).
691830 Gear−Timing
(Uses Woodruff Key)
742 93941 Retainer−E-Ring
743 691772 Gear−Drive
(Counterclockwise)
−−−−−−− Note −−−−−
690516 Gear−Drive
(Clockwise)
745 691648 Screw
(Brake)
750 691683 Screw
(Oil Pump Cover)
783 691918 Gear−Pinion
783A 691269 Gear−Pinion
784 795095 Cover−Starter Gear
785 692352 Gasket−Starter Cover
789A 696546 Harness−Wiring
801 690782 Cap−Drive
802 695267 Cap−End
803 695266 Housing−Starter
830 694544 Stud−Rocker Arm
832 691466 Guard−Muffler
832C 695593 Guard−Muffler
836 691147 Screw
(Muffler Guard)
836A 697551 Screw
(Muffler Guard)
842 K691031 Seal−O Ring
(Dipstick Tube)
843 691884 Sleeve−Lever
847 692047 Dipstick/Tube
Assembly
851 493880S Terminal−Spark Plug
853 695268 Adaptor−Wire
868 KΔ692044 Seal−Valve
883 KΔ691893 Gasket−Exhaust
886 696268 Gasket Kit−Cylinder
Head/Plate
914 691108 Screw
(Rocker Cover)
921B 697921 Cover−Blower Housing
922 691831 Spring−Brake
−−−−−−− Note −−−−−
692135 Spring−Brake
Used on Type No(s).
0100, 0163.
692135 Spring−Brake
(Used After Code Date
06081300).
Used on Type No(s).
0123.
691831 Spring−Brake
(Used Before Code
Date 06081400).
Used on Type No(s).
0123.
KIncluded in Engine Gasket Set−Ref. No.358.
DIncluded in Carburetor Overhaul Kit−Ref. No. 121.
zIncluded in Carburetor Gasket Set−Ref. No. 977.
ΔIncluded in Valve Gasket Set−Ref. No 1095.
REF. PART REF. PART REF. PART
NO. NO. DESCRIPTION NO. NO. DESCRIPTION NO. NO. DESCRIPTION

125600
Illustrations cover a range of engines. Parts shown without corresponding text may not be used on your specific engine.
6537−13 Assemblies include all parts shown in frames. 05/28/2008
13
923 691994 Brake
−−−−−−−Note −−−−−
695891 Brake
Used on Type No(s).
0100, 0163.
695891 Brake
(Used After Code Date
06081300).
Used on Type No(s).
0123.
691994 Brake
(Used Before Code
Date 06081400).
Used on Type No(s).
0123.
925 795403 Cover−Linkage
(Used After Code Date
07072200).
−−−−−−− Note −−−−−
690595 Cover−
Linkage
(Used Before Code
Date 07072300).
930 691919 Guard−Rewind
−−−−−−− Note −−−−−
499679 Guard−Rewind
Used on Type No(s).
0148.
930A 692675 Guard−Rewind
937 691325 Spline−Starter
943 692514 Seal−O Ring
(Oil Pump Cover)
957 692046 Cap−Fuel Tank
(Plastic)
958 698183 Valve−Fuel Shut Off
(Plastic)
965 692507 Cover−Oil Pump
966 692673 Base−Air Cleaner
Primer
967 493537S Filter−Pre Cleaner
968 692298 Cover−Air Cleaner
969 691138 Screw
(Blower Housing
Cover)
969A 697922 Screw
(Blower Housing
Cover)
972 699374 Tank−Fuel
(Plastic)
975 493640 Bowl−Float
976 694395 Primer−Carburetor
977 792385 Gasket Set−Carburetor
988 692515 Gasket−Oil Adapter
993 KΔ694088 Gasket−Cylinder Head
Plate
1005 691346 Fan−Flywheel
1019 695247 Kit−Label
1022 KΔ691890 Gasket−Rocker Cover
1023 499624 Cover−Rocker
1024 692508 Pump−Oil
1026 692045 Rod−Push
1055 692623 Tube−Oil Pump
1058 277102 Operator’s Manual
1059 692311 Kit−Screw/Washer
1095 792386 Gasket Set−Valve
1119 691183 Screw
(Alternator)
1210 498144 Pulley/Spring
Assembly
1027 692513 Filter−Oil
1028 692516 Adapter−Oil Filter
1029 691230 Arm−Rocker
1034 691343 Guide−Push Rod
1036 Label−Emissions
(Available From A
Briggs & Statton
Authorized Dealer)
(Pulley)
1211 498144 Pulley/Spring
Assembly
(Spring)
1319 794467 Label−Warning
1330 272147 Manual−Repair
KIncluded in Engine Gasket Set−Ref. No.358.
DIncluded in Carburetor Overhaul Kit−Ref. No. 121.
zIncluded in Carburetor Gasket Set−Ref. No. 977.
ΔIncluded in Valve Gasket Set−Ref. No 1095.
REF. PART REF. PART REF. PART
NO. NO. DESCRIPTION NO. NO. DESCRIPTION NO. NO. DESCRIPTION