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=IEPAIR PARTS
12 HP 38" RIDING LAWN TRACTOR -- MODEL NUMBER 917.257360
3RIGGS & STRATTON ENGINE- MODEL NUMBER 281707, TYPE 0412-0'1
_.EY PART KEY PART
_O. NO. DESCRIPTION NO. NO. DESCRIPTION
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27
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29
3O
31
32
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34
93158
93163
399265
391086
490450
261463
21O94O
261961
231597
27803
391406
280100
93394
491490
94160
262243
490466
222698
262135
262247
65906
221596
262246
26828
93630
292260
212897
802592
66538
89838
93723
222299
92909
490348
26O924
299691
391286
394665
391781
391782
391783
Screw, Blower Housing Mounting 38 394661
Sem 394662
Screw, Cylinder Shield Mtg Sem 894663
Bearing, Cylinder 394664
Note: Requires special tools for Piston Ring Sets
installation
Seal, Oil
Cylinder Assembly 39 271916
Seat, Intake Valve (Standard)
Seat, Exhaust Valve (Standard) 40 94305
Guide, Exhaust Valve 41 91084
Note: 231218 Guide - Intake Valve 42 291675
(Brass) 43 490452
Bushing, Governor Crank (1/4" ID) 44 490927
Gasket, Valve Cover
Breather Assembly 45 92613
Tube, Breather 46 231082
Screw, Sere 47 491323
Cover, Cylinder Head 48 93307
Pin, Eccentric 49 93306
Eccentric 50 231058
Crankshaft 51 222450
Note: Order Part Number 94196 for 52 212359
Timing Gear 53 93875
Key, Flywheel 54 298909
Gear, Timing 55 399891
Valve, Intake 56 490815
Spring, Intake Valve 57 398525
Retainer, Intake Valve 58 92791
Valve, Exhaust 59 93722
Spring, Exhaust Valve 60 90576
Retainer, Exhaust Valve Rotocoil 61 26157
(2) 62 90200
Rotocoil, Exhaust Valve 63 93572
Gear, Cam 64 260695
Plug, Spark (1 1/2" high - 37-42 65 390784
mm)
Elbow, Spark Plug 66 221535
Wrench, Spark Plug (3" 67 93496
Screw, Cylinder Head long) 68 260584
Lock, Connecting Rod Screw 89 262348
Screw, Connecting Rod 70 223715
Rod Assembly, Connecting 71 271866
Note: For Connecting Rod with 72 262248
.020" undersize Crankpin Bore - 73 491491
Order No. 490469
Lock, Piston Pin
Pin Assembly, Piston - Standard
Pin Assembly, Piston _005 O.S
Ring Set, Piston - Standard
Ring Set, Piston - .010" O S
Ring Set, Piston - _020" OS
Ring Set, Piston - 030" O.S.
Piston Assembly Standard
Piston Assembly - .010 O.S.
Piston Assembly - 020" O S
Piston Assembly - 030" O.S
Note: For Chrome Ring Set -
Standard size - Order No 392331
Gasket, Crankcase Cover (1/64"
thick)
Screw, Base Mounting Sem
Plug, Oil Drain
Seal, Oil
Base, Engine
Lever Assembly, Governor (For 1/4"
dia. Crank)
Bolt, Governor Lever
Nut, Hex 10 - 24
Seal, Oil
Retainer, E-Ring
Cotter, Hairpin
Crank, Governor (1/4" dia.)
Washer, Governor Crank (1/4" dia.)
Link, Counterweight
Screw, Counterweight (1)
Pin, Counterweight (1)
Counterweight Assembly
Oil Slinger, Governor
Insulator Assembly
Washer, Lock, Shake-proof
Terminal, Spade
Nut, Hex 8- 32
Spring, Throttle Adjustment
Screw, Machine Fil Hd 8 - 32 x 1/2
Screw, Carburetor
Spring, Governor
Plate, Governor Control (Choke-A-
Matic)
Clamp, Casing
Screw, Sem
Spring, Governor Link
Link, Governor
Shield, Cylinder
Gasket, Cylinder Head
Tappet Valve
Head, Cylinder
NOTE: All component dimensions given in U S inches
1 inch = 25.4 mm
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