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ENGINE
TRACTOR - MODEL NO. YTH24V54 (289640)
KEY PART
NO. NO. DESCRIPTION
1 Engine Briggs Model No. 445877-1198-B1
2 532 14 97-23 Muffler
9 532 19 43-20 Keeper Belt Engine
11 532 40 00-08 Clutch Electric
12 532 40 50-97 Pulley Engine
15 532 40 00-21 Tank Fuel
18 532 43 02-17 CapAsm
20 532 42 35-02 Control Throttle
21 532 41 83-58 Screw #10 x 0.750 BOS Thread
28 532 4011-35 Fuel Line
29 532 13 71-80 SparkArrester Kit
37 532 12 34-87 Clamp Hose
41 5321261-97 Washer l-l/2ODx15/321Dx.250
42 810 04 07-00 Washer Lock 7/16
45 873 51 04-00 Nut Keps Hex 1/4-20 unc
62 532 43 40-17 Shield Heat Muffler
89 532 18 53-91 Gasket
70 532 15 99-55 Tube Exhaust LH
71 532 16 05-89 Tube Exhaust RH
79 5321839-06 Screw Socket Head 5/18-18xl
81 532 14 84-58 Tube Drain Oil Easy
82 532 42 82-87 Drain Oil Valve
84 8170606-20 Screw 3/8-16x1-1/4
85 5321739-37 BoltHex7/16-20x4Cat. 5-1THR.
87 5321718-77 Bolt 5/18-18x3/4
90 8170008-18 Screw 3/8-18xl
91 532 18 74-95 Bushing
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 Automotive
Engineers) code J1940 (Small Engine Power & Torque Rating Procedure), and rating performance has been obtained
and corrected in accordance with SAE J1995 (Revision 2002-05). Torque values are derived at 3060 RPM; horsepower
values are derived at 3600 RPM. Actual gross engine power will be lower and is affected by, among other things, ambi-
ent operating conditions and engine-to-engine variability. Given both the wide array of products on which engines are
placed and the variety of environmental issues applicable 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 power). 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.
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