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: EPAIR PARTS
18 HP GARDEN TRACTOR ° - MODEL NUMBER 917.254450 & 917.250020
_NGINE BRIGGS AND STRATTON = MODEL NUMBER 422707, TYPE NUMBER 1228=01
CYLINDER, CRANKSHAFT AND ENGINE BASE GROUP
KEY PART DESCRIPTION KEY PART DESCRIPTION
NO, NO. NO. NO,
I 90576
2 89838
4 27803
5 92791
6 222892
7 93722
8 94382
9 224362
t0 93777
! 1 93559
12 492656
_3 90887
_4 270981
_5 212455
_6 261463
r7 213316
',8 493458
9 94565
?1 93686
?2 92290
73 393415
74 260924
_5 394959
75 394960
_5 39496.1
_5 394962
_6 394955
>.6 394956
'6 394957
'6 394958
_7 299691
'7 391286
'8 394348
'9 222773
0 394306
'1
2
3
4
5
6
7
7
7
OTE:
92909
220863
291675
91084
393552
271868
27! 142
27t 188
271189 "
Nut - Flex 8 - 32
Wrench, Spark Plug
Gasket - Valve Cover
Washer - Lock, Shakeproof
Cover - Breather Cylinder No. 2
Terminal- Spade
Screw- Sem
Ba rite - Air
Screw- Flex Head (Back Plate to
Cylinder)
Screw- Sem
Housing - Blower
Screw- Crankcase Cover Mtg. Sere
NOTE: USES 92228 LOCKWASHER
* Gasket - Crankcase
Cover Plate - Crankcase
+Seat- Intake Valve (Standard)
+Seat - Exhaust Valve (Standard)
Head - Cylinder No, 2
Screw- Cylinder Head
Screw- Flex Head (10- 32 x 5/8)
Washer- Lock (No. 10 x 1/16 x 3/64)
Oil Slinger Assembly
Lock - Piston Pin
Ring Set - Piston (Standard)
Ring Set - Piston (.010"0.S.
Ring Set - Piston (,020" O,S.
Ring Set - Piston (.030" O.S.
Piston Assembly (Standard)
(Inc. Key Nos, 24 & 25)
Piston Assembly (.010" O.S.
Piston Assembly (.020" O,S.
Piston Assembly (.030" O,S.
Pin Assembly - Piston (Standard)
(Inc. Key No. 24)
Pin Assembly _ Piston (.005"" O.S.)
Gear- Governor
Washer- Thrust
Rod Assembly - Connecting
(Inc. Key Nos. 31 & 32)
NOTE: FOR CONNECTING ROD
WITH .020"" UNDERSIZE CRANKPIN
BORE, ORDER NO. 397158
Screw _ Connecting Rod
Washer
Seal- Oil
Plug- Oil Drain
Base Assembly. Crankcase
*Gasket. Cylinder Head No. 2
"Gasket- Crankcase Co vet ( 1/64" th ic k)
"Gasket- Crankcase Cover (.005" thick)
"Gasket- Crankcase Cover (.009" thick)
All component dimensions given in U,S. inches,
1 inch = 25.4 ram.
38 222698
39 93585
40 94296
41 491287
42 262331
43 262332
44 491530
45 223882
46 394501
47 271157
48 94166
49 212337
50 222875
51 280224
52 271170
53 394020
54 394394
55 390420
56 261528
57 231445
58 393606
59 26828
60 292260
61 93630
62 221596
63 65906
64 261368
65 394028
66 261961
67 49_30
68 230318
69 802592
70 66538
72 280225
73 394358
74 493457
75 271867
76 491304
77 399265
78 391086
79 391115
80 299146
81 93053
82 393370
83 93496
84 223890
85 221535
Key- Flywheel
Screw- Hex Hd. Sem
Retainer- E-Ring
Foam Seal - Governor Shaft
Upper Bushing - Governor
Lower Bushing _ Governor
Crank - Governor
Washer _ Governor Crank (Inside)
Gasket Set
Sea! - Filler Tube
Screw- Hex Head
Gear- Cam
Clamp - Oit Filler
Tube - Oil Filler
Seal - Oil Filler Cap
Cap and Dipstick _ Oil F/tier
Dipstick and Tube Assembly !tnc. Key
Nos. 47, 48, 50, 51, 52 & 53)
Valve- Exhaust
Valve- Intake
Gear- Timing
Seat Assembtv and Retainer
Spring. Exhaust Valve
Rotocoil- Exhaust Valve
Reta;7_er. Exhaust Valve Rotocoi/
Retainer -/ntake Valve
Spring- Intake Valve
Tappet. Valve "
Crankshaft
NOTE. ORDER NO. 94196 FOR
TIMING GEAR RETAINING DEVICE
+Guide. Exhaust Valve
NOTE: 231218 GUIDE INTAKE
(BRASS)
Cylinder Assemb!y (Inc. Key No. 68)
Connector, Impulse Pump
Ptug - Spark (Resistor)Champmn RJ 12
or equivalent
Elbow- Spark Plug
Tube Breather
Filter - Fuel (In Fuel Lioe to Tank)
Head - Cylinder No. 1
*Gasket- Cylinder
Back Plate Assembly
+Bearing- Cylinder
Seat. Oil
Wire. Ground
Line. Fuet (28"'cut to required length)
(Inc. Key No, 81)
Clamp. Fuet Line
Breather Assembly No. 1
Screw. Hex Head
Bracket- Choke Cable
Clamp - Casing
"INCL UDED IN GASKET SET 394501
+SPECIAL TOOLS REQUIRED TO INSTAL L
43
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