BRIGGS & STRATTON 4-CYCLE
ENGINE
MODEL NUMBER 123K02-O258-E1
KEY PART
NO.
NO,
DESCRIPTION
KEY PART
NO. NO.
DESCRIPTION
26
499425
Ring Set-Piston (Standard)
443
692523
499426
Ring Set-Piston (.010" Oversize)
445
491588
499427
Ring Set-Piston (.020" Oversize)
455
691219
499428
Ring Set-Piston (.030" Oversize)
456
692299
27
691866
Lock-Piston Pin
459
281505
28
499423
Pin-Piston
505
231082
29
499424
Rod-Connecting
523
495264
32
691664
Screw (Connecting Rod)
524
692296
32A
695759
Screw (Connecting Rod)
525
495265
33
262651
Valve-Exhaust
529
691923
34
262652
Valve-Intake
562
92613
35
691270
Spring-Valve (Intake)
564
698589
36
691270
Spring-Valve (Exhaust)
584
692342
37
694086
Guard-Flywheel
565
691879
40
692194
Retainer-Valve
592
690800
43
691997
SUnger-Governor/Oil
597
691696
45
690548
Tappet-Valve
601
95162
46
691449
Camshaft
604
698588
48
498829
Short Block (Replacement
608
497680
Engine 125K02-0253)
613
691340
50
497465
Manifold-Intake
615
690340
51
272199
• Gasket-Intake
616
698801
54
691650
Screw (intake Manifold)
617
270344
55
691421
Housing-Rewind Starter
621
692310
58
692259
Rope-Starter (Cut to Length)
633
691321
60
281434
Grip-Starter Rope
635
66538
65
690837
Screw (Rewind Starter)
668
493823
78
691108
Screw (Flywheel Guard)
670
692294
81
691740
Lock-Muffler Screw
684
690345
95
691636
Screw (Throttle Valve)
689
691855
97
696565
Shaft-Throttle
718
690959
104
691242
_Pin-FIoat
Hinge
741
691830
117
498978
Jet-Main (Standard)
745
691648
118
497466
Jet-Main (High Altitude)
842
691031
121
498260
Kit-CarburetorOverhaul
847
692017
125
498170
Carburetor
851
493880
127
694468
_Plug-Welch
868
697338
130
696564
Valve-Threttle
869
691155
133
398187
Float-Carburetor
870
690380
134
398188
_)Valve-Needle/Seat
871
262001
137
693981
_Gasket-FloatBowl
63709
146
690979
Key-Timing
921
696587
159
691753
Bracket-AirCleanerPdmer
922
692135
163
272653
.Cl:l:Gasket-Air Cleaner
923
695891
167
691050
Line-Fuel (Cut to Required Length)
957
397974
188
693399
Screw (Control Bracket)
966
496116
190
690940
Screw (Fuel Tank)
968
692298
202
691829
LInk-MechanicaIGovernor
969
691138
209
690319
Spring-Governor
970
691669
222
692467
Bracket-Control
972
495224
227
690783
Control Lever-Governor
975
493640
276
271716
Cl:J:SealingWasher
976
694395
287
690940
Screw (Dipstick Tube)
977
498261
300
692038
Muffler
1019 494256
304
695892
Housing-Blower
1036 697456
305
691108
Screw (Blower Housing)
1059 692311
306
690450
Shield-Cylinder
1210 498144
307
690345
Screw (Cylinder Shield)
1211 498144
332
690662
Nut (Flywheel)
333
802574
Armature-Magneto
334
691061
Screw (Armature Magneto)
337
802592
Plug-Spark
356
692390
Wire-Stop
358
497316
Engine Gasket Set
363
19069
Flywheel Puller
365
692524
Screw (Carburetor)
363
89838
Wrench-Spark Plug
404
690272
Washer (Governor Crank)
425
690670
Screw (Air Cleaner Cover)
Screw (AirCleaner PrimerBase)
Filter-AirCleaner Cartridge
Cup-Flywheel
Plate-Pawl Friction
Pawl-Ratchet
Nut (GovernorControlLever)
Dipstick
• Seal-Dipstick Tube
Tube-Dipstick
Grommet
Bolt(GovernorControlLever)
Screw (ControlCover)
Cover-BreatherPassage
• Gasket-BreatherPassage
Nut (Rewind Starter)
Screw (PawlFdctionPlate)
Clamp-Hose
Cover-Contrel
Starter-Rewind
Screw(Muffler)
Retainer-Governor Shaft
Crank-Governor
•O:l:SeaI-ORing (Intake Manifold)
Switch-Stop
O:E:SeaI-Throttle Shaft
Boot-SparkPlug
• Spacer (Includes2)
Spacer-FuelTank
Screw(Breather PassageCover)
Spring-Friction
Pin-Locating
Gear-Timing
Screw (Brake)
• SeaI-O Ring (DipstickTube)
Assembly-Dipstick/Tube
TerminaFSparkPlug
Seal-Valve
Seat-Valve(intake)
Seat-Valve(Exhaust)
Bushing-Guide (Exhaust)
Bushing-Guide (Intake)
Cover-BlowerHousing
Spring-Brake
Brake
Cap-FuelTank
Base-AirCleaner Primer
Cover-AirCleaner
Screw (BlowerHousingCover)
Screw (AirCleaner PrimerBracket)
Tank-Fuel
Bowl-Float
Primer-Carburetor
Set-CarburetorGasket
Kit-Label
Label-Emissions
Kit-Screw/Washer
Assembly-Pulley/Spring ( Pulley)
Assembly-Pulley/Spring ( Spring)
RPM Settings:
Low: 1900-2100;
High:3000-3200
•
Includedin EngineGasket Set, KeyNo. 358
Includedin Carburetor OverhaulKit, Key No. 121
:1: Includedin CarburetorGasket Set, Key No. 977
NOTE: All component d imensions given in U.S. inches
1 inch= 25.4 mm
43