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ENGINE
TRACTOR - - MODEL NUMBER 917.274811
KEY PART
NO. NO. DESCRIPTION
1 170545 Control, Throttle/Choke
2 17720408 Screw, Hex Thd Cut 1/4-20 x 1/2
3 Engine, B&S, No. 31P777-0296-E1
(See Breakdown)
4 137352 Muffler Exhaust
13 165291 Gasket, Muffler
14 148456 Tube Drain Oil Easy
23 169837 Shield, Brn/Dbr Guard
29 137180 Arrestor, Spark
31 157103 Tank, Fuel
32 161696 Cap Fuel
33 123487X Clamp, Hose
34 106082X Pad Spacer
37 8543R Line, Fuel
38 181654 Plug, Oil Drain Easy
39 109227X Pad Idler
44 17670412 Screw Hexwsh Thdrol 1/4-20 x 3/4
45 17000612 Screw Hex Wsh 3/8-16 x 3/4
46 19091416 WEasher 9/32 x 7/8 x 16 Ga.
62 10010500 Washer Split
72 71070512 Screw Hex Head Cap 5/16-18 x 3/4
78 17060620 Screw 3/8-16 x 1-1/4
81 73510400 Nut Keps Hex 1/4-20 Starter Nut
NOTE: All component dimensions given in U.S. inches
1 inch = 25.4 mm
For engine service and replacement parts, call the toll
free number for your engine manufacturer listed below:
Briggs & Stratton 1-800-233-3723
Engine Power Rating information
The gross power rating for individual gas engine models is labeled in accordance with SAE (Society of Automo-
tive Engineers) code J11940 (Small Engine Power & Torque Rating Procedure), and rating performance has been
obtained and corrected in accordance with SAE J1995 (Revision 2002-5). Actual gross engine power will be
lower and is affected by, among other things, ambient operating conditions and engine-to-engine variability. Gi-
ven both the wide array of products on which engines are placed and the variety of environmental issues applica-
ble to operating the equipment, the gas engine will not develop the rated gross power when used in a given piece
of power equipment (actual "on-site" or net horsepower). This difference is due to a variety of factors including,
but not limited to, accessories (air cleaner, exhaust, charging, cooling, carburetor, fuel pump, etc.), application
limitations, ambient operating conditions (temperature, humidity, altitude), and engine-to-engine variability. Due to
manufacturing and capacity limitations, Briggs & Stratton may substitute an engine of higher rated power for this
Series engine.
43
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