Craftsman 917.270631 To Adjust Carburetor, Preliminary Setting, Final Setting, Acceleration Test

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TO ADJUST CARBURETOR

NOTE: The carburetor on this engine is low emission° it is equipped with an idle fuel adjusting needle with a limiter cap, which allows some adjustment within the limits allowed by the cap. Do not attempt to remove the lirniter cap. The limiter cap cannot be removed without breaking the adjusting needle_

The carburetor has been preset at the fac- tory and adjustment should not be neces- sary. However; minor adjustment may be required to compensate for differences in fuel, temperature, altitude or load. if the carburetor does need adjustment, proceed as follows:

tn general, turning idle mixture valve in (clockwise) decreases the supply of fuel to the engine giving a leaner fuel/air mixture. Turning the idle mixture valve out (counterclockwise) increases the supply of fuel to the engine giving a richer fuel/air mixture.

BtVJPORTANT: Damage to the needle valve and the seat in carburetor may result if screw is turned in too tight.

PRELIMINARY SETTING

o Air cleaner assembly must be assem- bled to the carburetor when making car- buretor adjustments.

,,Be sure the throttle control cable is adjusted properly (see above).

FINAL SETTING

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

o Move throttle control lever to slow posi- tion. With finger, rotate and hold throttle lever against idle speed screw. Turn idle speed screw to attain 1750 RPM.

o While still holding throttle lever against

idle speed screw, turn idle mixture valve full travel clockwise then counterclock-

wise until engine runs rough. Turn valve to a point midway between those two

positions. Release throttle lever_

ACCELERATION TEST

,,Move throttle control lever from slow to fast position, tf engine hesitates or dies, turn idle mixture valve out (counter- clockwise) 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. IMPORTANT; Never tamper with the engine governor, which is factory set for proper engine speed, overspeeding the engine above the factory high speed set- ting can be dangerous, if you think the engine-governed high speed needs adjusting, contact your nearest authorized service center, which has proper equip- ment to make any necessary adjustments.

Idle Speed

Throttle

Screw

Lever

idtJMixture_

Valve With f-

Limiter

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Contents Lawn Limited TWO Year Warranty on Craftsman Riding Equipment Limited 90 DAY Warranty on BatteryDo not ServiceSlope Operation ChildrenTY is Involved Grass can hide obstaclesProduct Specifications Parts BAG Contents Shown Full Srze Parts BAG Contents Shown Full SiZE To Remove Tractor from Carton Unpack Carton Assemble Extension Shaft and BootInstall Steering Wheel Before Rolling Tractor OFFInstall Seat Install Mulcher PlateCheck Brake System Check Tire PressureCheck Deck Levelness Keep Area Clear Slope Hazards See Safety Rules Section Know Your Tractor Attachment Clutch Lever UsedThrottle Control HOW to USE Your TractorTo SET Parking Brake Stopping Mower BladesTo Transport To Operate MowerTo Operate on Hills Before Starting the Engine Check Engine OIL LevelCold Weather Starting 50 F and below To Start EngineWarm Weather Starting 50 F and Above Mowing TPSMulching IVIOWnNG TiPS Important For best performance General Recommendations Lubrication Chart Before Each USETo Sharpen Blade BatteryBlade Removal Jelly AIR FilterMuffler Clean AIR ScreenCleaning Spark PlugsTo Install Mower To Remove MowerBelt Removal To Level Mower HousingTo Replace Mower Blade Drive To Adjust Brake TI %To Adjust Steering Wheel Align To Start Engine That has a Weak BatteryInterlocks and Relays To Remove Hood and Grill AssemblyTo Adjust Throttle Control Cable To Replace FuseFinal Setting To Adjust CarburetorPreliminary Setting Acceleration TestExperience indicates that alcohol blended Cylinders BatteryIt is important to prevent Cause Loose or damaged wiring. Faulty ignition switchReplace fuse Clean battery terminals Dirty air filterCause Correction ProblemWiring Problem OlIIoltt Tractor - Model NumberElectrical KEY Part Description I4o-3 Chassis and EnclosuresTractor - Model Number Tractor - Model Number Ground Drive Tractor -- Model Number Ground Drive KEY PartTRACTOR- = Model Number Steering Assembly KEY Part NO. NO.DESCRIPTION Steering AssemblyTractor - Model Number Spark Arrester Engine Optional EquipmentTractor - Model Number KEYPart Description EAT AssemblyKEY Wheels & Tires Tractor -- Model NumberDecals Lift Assembly Tractor - Model Number Tractor - Model NUiVIBER Mower Deck Dana Transaxle - Model Number Tractor Danatransaxle - Model Number230 9230 635337 987 Valve Overhaul KIT Carburetor Overhaul KITGasket SET Carburetor Gasket SETTractor - Model Number 615KEY Part NO. no 391086Tractor - Model Number 917.917.2706,31 Part KEYPage Page Page Only Ride UP and Down Hill Not Across Hill Guideth Sight and Hold this Level with SKY Line or TreeCall 24 hours a day, 7 days a week Para ordenar piezas con entrega a DomicilioPara pedir servicio de reparacidn a domicilio
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