Engine, KEY Part NO. no | Sears 917.257720 instruction

REPAIR PARTS

18 HP 44" TRACTOR = MODEL NUMBER 917.257720

ENGINE

KEY PART NO. NO.

114! 948

2 144110

313240300

413280328

51320030O

6138129

8121361X

9138559

10105432X

11137140

12136907

13138486

14138487

15127334X

16109227X

17106082X

18123549X

1913290300

2O 133439

21 17720410

			KEY	PART
DESCRiPTiON			NO.	NO.	DESCRiPTiON
Engine	Kohler 18 Mag Vt		22	138672	Control		Choke
Muffler	Asm	Kohler VGT (Inc. Key	23	19132616	Washer		13/32 X 1 - 5/8 X 16 Ga
No. 34)			24	11050600	Washer		Ext Tooth		3/8
Elbow	Street	3/8 NPT	25	73610600	Nut Fin Hex 3/8 - 24 UNF
Nipple	Pipe 3/8NPT X 3 - 1/2		26	3645J	Bushing
Elbow STD 90 Degree 3/8 - 18 NPT			27	139277	Stem Tank Fuel
Clamp	Tube	Double Engine	28	7834R	Fuel Line
Pulley	V-Idler		29		Spark Arrester			Kit
Stop Keeper Asm VGT			30	105037X	Strip Foam
Bushing			32	17490508	Screw	Thdrol		5/16 - 18 X 1/2
Clutch	Electric		34	17720408	Screw Thd Cut 1.4 - 20 x 1/2
Pulley Engine VGT Elect Clutch			35	10040500	Washer		Lock 5/16
Baffle Air LH Koh VGT			36	74570512	Screw		Hex 5/16 - 16 UNC X 3/4
Baffle Air RH Koh VGT			37	123487X	Clamp		Hose
Tank Fuel W/Sym Vented			38	11050600	Lockwasher Ext Tooth 3/8
Pad Spacer			39	17490624	Screw	Thdrol		3/8 - 16 X 1 - 1/2 TT
Pad Spacer			40	17490652	Screw	Thdrol		3/8 - 16 X 3 - 1/4
Cap Asm Fuel W/Sym, Vented			41	126197X	Washer		1-1/20D		X 15/32 ID X .250
Plug Oil Drain (Order From Engine			42	10040700	Washer		Lock 7/16
Manufacturer)			43	71170768	Bolt Hex 7/16			- 20 X 4 - 1/4 Ga 5
Control	Throttle
Screw	Hex Thd Cut 1/4 - 20 X 5/8		NOTE: All component dimensions given in U.S. inches
			NOTE: All component dimensions given in U.S. inches
				1 inch = 25.4	mm

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41

Image 41

Sears 917.257720 owner manual Engine, KEY Part NO. no

Contents

Number 917.257720 Ownersmanual IL Slope Operation Safety is Involved Product Specifications Maintenance AgreementLmMREDTWO Year Warranty on Electric Start Riding Equipment Limited 90 DAY Warranty on Battery Repair Maintenance Schedule Performance Engine MaintenanceEssories and Attac Ents Pack Contents ,OF To Remove Tractor from Carton Tools Required for AssemblyBefore Rolling Tractor OFF Skid Unpack Carton Assem LY HOW to SET UP Your TractorCheck Tire Pressure Check Brake System Check Deck Levelness Install Mower and Drive BeltCheck for Proper POSiTiON of ALL Belts Install Battery See Figs, 5 Assembly Know Your Tractor Eration To Move Forward and Backward HOW to USE Your TractorOperati To Operate on Hills OP RATBefore Starting the Engine ADD Gasoune Mowing TipsTo Start Engine See Fig Starting Maintenance Schedule Lubrication ChartFill in Dates AS YOU Complete Regular Service Service Dates General Recommendations Custome Respo Lities To Clean Battery and Terminals Battery See FigCusto ENGmNE Ponsi Ilities CleaningCustome To iNSTALL Mower Service Adju NTSTractor To Remove Mower See Fig To Replace Mower DRIVE. Belt Service and AOJ Stments To Replace Mower Blade Drive Belt To Adjust Attachment Clutch See FigSE CE To Adjust Steering Wheel Alignment Service and AdjustmentsFront Wheel TOE-IN Adjustment To Replace Motion DRmVE Belt See Fig CovE \ SE CE AN a Ustments To Remove Hood and Grill Assembly CE and AdjustmentsTo Adjust Attachment LiFT Spiring See Fig To Adjust Throttle Control Cable See Service aTo Adjust Carburetor See Fig Engine Other Storage SE ICE Otes Correction ProblemCause Cause Correction ProblemTrou Lesh OTI Points 18 HP 44 Tractor = Model Number SchematicWH,TEhi @ Clips Part 18 HP 44 Tractor - Model NumberDescription KEY Electrical 18 HP 44 Tractor Model Number Part 18 HP 44 Tractor --MODEL Number 917,257720 Chassis and Enclosures Descraption Chassis and EnclosuresKEY Part Ground Drive DESCRiPTiON Steering Assembly NO. no KEY Part Model Number ENGIN,E KEY Part NO. no 18 HP 44 Tractor Model Number 917,257720 Seat Assembly Tractor .. Model Number 18 HP20 1918 NO. no Description Mower Deck KEY Part NO. no HP 44 Tractor .- Model Number 9! 7,257720 8887 Transaxle Transaxle Breather and Vent Kohler Engine Model Number MV18S, Type NumberBaffles and Shroud Kohler Engine = Model Number MV18S 18 HP 44 TractorType Number KEY Part Description 18 HP 44 Tractor Model Number 917,257720 Kohler Engine = Model Number MV18S, Type Number 18 HP 44 Tractor = Model Number 9Crankcase Carburetor KEY Part NO. no 18 HP 44 Tractor o Model Number Cylinder Head 18HP 44 Tractor .. Model Number Kohler Engine o Model Number MV18S, Type Number 18 HP 44 TRACTOR- Model ,NUMBER 917o257720 Governor Fuel Pump KEY Partdescription NO. no Kohler Engine Model Number MVlSS, Type NumberFlywheel KEY Partdescription NO. no Camshaft and Valves Kohler Engine Model Number MV18S Type Number LOW OIL Pressure SwitchPiston & ROD Camshaft & Valves RViCE OTE Not Across HiLL Only Ride UP and Down Hill Repair When Ordering Repair PARTS, Always GivePRODUCT- Tractor ,MODEL Number Part Description