Craftsman 917.252560 manual Service and Adjustments, To Adjust Carburetor, See Figs, Final Setting

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SERVICE AND ADJUSTMENTS

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TO ADJUST CARBURETOR

(See Figs. 32 and 33)

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 infuel, temperature, altitude or Ioado 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)_

oWith 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.

°Continue 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 accel- erates smoothly

High speed stop is factory adjusted,, Do not adjust - damage may resulL

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 IF YOU THINK THE ENGINE-GOVERNED

HIGH SPEED NEEDS ADJUSTING, CONTACT YOUR

NEAREST AUTHORIZED SERVICE CENTER/ DEPARTMENT, WHICH HAS PROPER EQUIPMENT AND

EXPERIENCE TO MAKE ANY NECESSARY ADJUSTMENTS

IDLE SPEED

SCREW

IDLE MIXTURE

SCREW

THROTTLE

LEVER

FIG. 32

IDLE SPEED __

_t_

THROTrLE

\ IDLE MIXTURE

LEVER

SCREW

FIG, 33

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Contents Model Safe Operation Practices for Ride-On Mowers Maintenance Agreement LIMITF.D 90 DAY Warranty on BatteryCustomer Responsibqlitues Product SpfecufrcationsNIBE× Accessories and Attachments MaintenanceENGnNEE PerformanceHardware Pack 2Ve,dNuts1oTools Required for Assembly To Remove Tractor from CartonBefore Rolung Tractor OFF Skid Unpack CartonAssembly HOW to SET UP Your TractorPrepare Battery See Figs, 2A and 2B Install Seat See FigInstall Battery See Figs a and 4B Check TiRE PressureCheck Deck Levelness Chck for Proper Position of ALL BeltsINSTALL Mulcher Plate ASSE#BLYSee Figs a To Convert to BAGGaNG orOperatbon Know Your TractorHOW to USE Your Tractor To Adjust Mower Cutting HeightOperation Stopping See FigBefore Starting the Engine To TransportADD Gasoline To Operate on HillsOpeiratuo Mowing TipsTo Start Engine See Fig Mulching Mowing TipsMaintenance Schedule Lubrication ChartGeneral Recommendations Before Each USECustomer Responsibilities TractorBrake Operation TiresCusyome Responsubiuvies EngineAIR Filter See Fig Engine Cooling Fins See Fig MufflerSpark Plugs IN-LINE Fuel Filter See FigTo Install Mower See Fig To Remove Mower See FigDepress clutch/brake pedal fully and set parking brake L,H. Suspension Arms Must be Removed from TractorTo Level Mower Housing Both Front Links Must be Equal in LengthTo Adjust Brake See Fig To Replace Mower Blade Drive BeltTo Replace Motion Drive Belt See FigService AN AdjustmentsEngine To Replace Headlight BulbTo Remove Hood and Grill See Fig Service and Adjustments To Adjust CarburetorFinal Setting See FigsBattery StorageOther Engine OILTroubleshooting Pobnts Problem CauseCorrection Problem Cause Correction Troubleshootung PointsService Notes Schematic Tractor - Model NumberConnected to \.-JElectrical Tractor = = Model Number KEY Part DescriptionChassis and Enclosures 3834Tractor - Model Number Chassis and EnclosuresKEY Part NO. noRepair Parts DriveTractor =- Model Number F2000008Steering Assembly Grease Seat Assembly Tractor -- Model NumberTractor = Model Number DecalsWheels & Tires Stem ValueEngine 1310Engine KEY Part NO. no144068 Tractor - Model Number Mower Lift 521 161718122365X Button Plunger Read T22512X Spring Mower Deck 33102KEY Part NO. no LoHoUNC Peerless Transaxle Model Number Peerless Transaxle Model Number Part DescriptionRing U.S24 634A 552A552 219A 523Pumprepair KgT 102104 103 468653 310267 414 206305 304306 305A Briggs & STRATlrON Engine Model Number 42A707, Type Number KEYPart Description IntakePart KEY PartPage Only Ride UP and Down Hill Not Across Hill Sighting UideSight and Hold this Level with SKY Line or TreeFor Repair SERVICE, Call this Toll Free Number Or PartsPart Description
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