Sears 917.259567 Ervice, To Adjust Carburetor See Figs, Preliminary Setting, Final Setting

Page 25

ERVICE AND

TO ADJUST CARBURETOR (See Figs. 34 &

35)

The carburetor has been preset at the factory and adjust- ment should not be necessary. However, minor adjust- ment may be required to compensate for differences in fuel, temperature, altitude or load, If the carburetor does need adjustment, proceed as follows:

In general, turning the mixture screw in (clockwise) de- creases the supply of fuel to the engine giving a leaner fuel/ air mixture. Turning the mixture screw out (counterclock- wise) increases the supply of fuel to the engine giving a richer fuel/air mixture.

iMPORTANT: DAMAGE TO THE NEEDLES AND THE

SEATS IN CARBURETOR MAY RESULT IF SCREW IS

TURNED IN TOO TIGHT.

PRELIMINARY SETTING -

Be sure you have a clean air filter, and the throttle control cable and choke are adjusted properly (see above).

With engine off turn idle mixture screw in (clockwise) closing it finger tight and then turn out (counterclock- wise) 1-1/4 to 1-1/2 turns.

FINAL SETTING -

-Start engine and allow to warm for five minutes. Make final adjustments with engine running and shift/motion control lever in neutral (N) position.

•With throttle control lever in slow position, hold throttle lever against idle speed screw and adjust idle speed screw to obtain 1200 to 1400 RPM

=While still holding throttle lever against idle speed screw, turn idle mixture screw in (clockwise) until engine begins to die and then turn out (counterclock- wise) until engine runs rough. Turn screw to a point midway between those two positions.

oContinue to hold throttle lever against idle speed screw and adjust idle speed screw to obtain 900 to 1200 RPM. Release throttle lever.

ACCELERATION TEST -

Move throttle control lever from slow to fast position. If

engine hesitates or dies, turn idle mixture screw out (counterclockwise) 1/8 turn. Repeat test and continue to adjust, if necessary, until engine accelerates smoothly.

High speed stop is factory adjusted. Do not adjust - damage may result.

ADJUSTMENTS

IMPORTANT:

NEVER

TAMPER

WITH THE ENGINE

GOVERNOR, WHICH IS FACTORY SET FOR PROPER

ENGINE SPEED. OVERSPEEDING THE ENGINE ABOVE

THE FACTORY HIGH SPEED SETTING CAN BE

DANGEROUS. IFYOU THINKTHE ENGINE-GOVERNED

HIGH SPEED NEEDS ADJUSTING, CONTACT YOUR

NEAREST AUTHORIZEDSERVICE CENTER/

DEPARTMENT, WHICH HAS PROPER EQUIPMENT AND

EXPERIENCETO MAKE ANY NECESSARY ADJUSTMENTS.

IDLE SPEED

SCREW

iDLE MIXTURE

SCREW

THROTTLE

LEVER

 

 

FIG, 34

IDLE SPEED

'_

 

SCREW

_J 1--.

t I \

iDLE MIXTURE

LEVERSCREW

FIG, 35

25

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Image 25
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Contents Ii....i III Children Safe Operation Practices for Ride=On MowersProduct Specifications Maintenance AgreementLimited TWO Year Warranty on Craftsman Riding Equipment Customer ResponsibilitiesIndex Performance Engine MaintenanceContents Tools Required for Assembly AssemblyTo Remove Tractor from Carton Before Rolling Tractor OFF SkidAsse LY HOW to SET UP Your TractorCheck Deck Levelness Check for Proper Position of ALLINSTALL Mulcher Plate See Figs ChecklistTo Convert to Bagging or DischargingLight Lights on Over TempChoke Mower Height Differential Parking Brake Know Your Tractor OperaticTo Adjust Mower Cutting Height HOW to USE Your TractorOperation To USE Throttle Control See FigTo Operate Mower See Fig Before Starting the EngineTo Transport Check Engine OIL Level See FigTo Start Engine See Fig Mowing TipsMulching Mowing Tips Lubrication Chart Maintenance ScheduleCustomer General RecommendationsTractor Customer ResponsibilitiesBrake Operation TiresStomer Respon Bilities Battery=BELTS Transaxle CoolingIlities Clean AIR Screen See FigAIR Filter See Fig Engine Cooling Fins See FigCER Respo Ibilitie CleaningSpark Plugs IN-LINE Fuel Filter See FigTo iNSTALL Mower See Fig Service and AdjustmentsTractor To Remove Mower See FigTo Level Mower Housing Service AN AdjustmentsReplace Mower Ervice and AdjustmentsBlade Drive BeltTo Start Engine with a Weak Battery ServiceTo Adjust Steering Wheel Alignment ADJ StmentsEngine AdjustmentsTo Replace Headlight Bulb Interlocks and RelaysPreliminary Setting To Adjust Carburetor See FigsFinal Setting ErviceOther BatteryFuel System Engine OILProblem Cause Correction Troubleshooting PointsTRO Leshooting Points Problem CauseSchematic Electrical Electrical Tractor =- Model Number £17.259567KEY Part Chassis and Enclosures Chassis and Enclosures Tractor = Model NumberKEY Part NO. NO. DESCRMPT!ONDrive Tractor - Model NumberKEY DrivePart KEY DescriptionSteering Assembly LR.LT Part DescriptionKEY Part Description Seat AssemblyWheels & Tires DecalsEngine Engine Tractor - Model Number 917,259567KEY Part NO, NO. Description Mower LiFT NO. no Mower LiftMower Deck Mower Deck Tractor - Model NumberKEY Part Description UNCDana Transaxle = Model Nuiviber 4360=122 Descruption Dana Transaxle = Model Number 43S0-122534 Tractor = = Model Number284A445 525 284634 205468 Gasket SET Pump Repair802 801311 201Label KIT Tractor - Model Number305 304 308A497074 399265 391086 493304 493457 271867 495754 KEY Part NO. noKeypart NO. no Description Service Otes Guide SiGHTiNGERS Manual Repair ServiceIf YOU Need Or Parts
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