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REPAIR PARTS
TRACTOR - - MODEL NUMBER 917.256410
BRIGGS & STRATTON
ENGINE - MODEL NUMBER 28R707, TYPE NUMBER 0637-A1
KEY PART
KEY PART
NO. NO.
DESCRIPTION
NO. NO.
DESCRIPTION
t
2
3
5
7
8
9
10
11
12
13
15
16
t8
2O
22
23
24
25
26
27
28
29
32
33
34
35
36
37
4O
41
42
45
46
5O
51
496413
399265
391086
494240
94881
231109
271866
495735
27803
94621
280100
271916
271997
271996
94622
94239
495162
94196
494238
291675
94624
492326
222698
394661
394662
394663
394664
391780
392331
391781
391782
391783
260924
299691
391286
490348
490469
94671
262246
262247
65906
26828
224502
221596
292260
494553
262248
212897
213819
272465
Cylinder Assembly
Bearing, Cylinder
Seal, Oil
Head, Cylinder
Screw, Hex (Qty. 1) (Key No. 305A)
Spacer (Qty. 1) (Key No. 668A)
* Gasket, Cylinder Head
Breather Assembly
(Includes Mounting Gasket)
* Gasket, Valve Cover
Screw, Seres
Tube, Breather
* Gasket, Crankcase Cover, 1/64"
* Gasket, Crankcase Cover, .005"
, Gasket, Crankcase Cover, .009"
Screw, Cylinder Head
Plug, Oil Drain
Crankshaft :
Key, Timing Gear
Base, Engine
* Seal, Oil
Screw, Sems, Base Mounting
Flywheel
Key, Flywheel
Piston Assembly, Standard Size
Piston Assembly, .010" Oversize*
Piston Assembly, .020" Oversize
Piston Assembly, .030" Oversize
Ring Set, Standard Size
Ring Set, Standard Size, Chrome
Ring Set, .010" Oversize
Ring Set, .020" Oversize
Ring Set, .030" Oversize
Lock, Piston Pin
Pin, Piston, Standard Size
Pin, Piston, .005" Oversize
Rod, Connecting
Rod, Connecting, .020" Undersize
Screw, Connecting Rod
Valve, Exhaust
Valve, Intake
Spring, Valve
Spring, Valve
Guard, Flywheel
Retainer, Intake Valve
Rotocoil, Exhaust Valve
Retainer, Rotocoit
Tappet, Valve
Gear, Cam
Carburetor, Elbow
*** Gasket, Carburetor
52
272554
53
94637
73
224948
75
225136
78
94626
93
281346
95
94098
98
495800
104
231789
105
231855
106
231854
108
224540
108A 224558
118
498030
121
497535
123
94913
125
498027
127
---
130
224539
131
494379
133
494381
137
281165
138
281164
141
495931
141A 494380
142
497736
142A 497737
147
498239
171
281051
186
494451
187
393815
188
94627
20t
262767
209
260871
216
262766
219
490815
222
495611
224
94729
227
493935
23O 94927
232
262785
240
394358
265
221535
* Gasket, Carburetor
Stud, Carburetor Mounting
Screen, Rotating
Washer, Spring
Screw, Sems
Bushing, Throttle Shaft
** Screw, Throttle
Screw, Idle Adjust
** Pin, Float Hinge
** Valve, Inlet Needle
**Seat, Inlet
Valve Choke
Valve, Choke
Valve, Needle
Carburetor Kit
Screw, Elbow Mounting
Carburetor
** Plug, Welch (Sold in Kit Only)
Valve, Throttle
Shaft, Throttle
Float, Carburetor
*** Gasket, Float Bowl
*** Washer, Float Bowl
Shaft, Choke
Shaft, Choke
** Nozzle, Carburetor
Nozzle, Carburetor (High Altitude)
** Pilot, Jet
Nut, Air Cleaner
Elbow, Fuel Pipe
Line, Fuel (11" Long, Cut to Suit)
Screw, Sems
Link, Governor
Spring, Governor
Link,
Choke
Gear, Governor
Plate, Governor Control
Screw, Hex Head
Lever Assembly, Governor
Washer, Governor Crank
Spring, Governor Link
Filter, Fuel
Clamp, Casing
*
Included in Gasket Set (494241)
**
tncluded in Carburetor Kit (497535)
***
included in both Carburetor Kit (497535),
and Carburetor Gasket Set (494385)
NOTE: All component dimensions given in U.S. inches
1 inch = 25.4 mm
52
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