Husqvarna GTH220 owner manual To Adjust Carburetor See Fig, Preliminary Setting, Final Setting

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SERVICE AND ADJUSTMENTS

TO ADJUST CARBURETOR (See Fig. 37)

The carburetor has been present at the factory and adjust- ment should not be necessary. 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:

In general, turning the adjusting needles in (clockwise) decreases the supply of fuel to the engine giving a leaner fuel/air mixture. Turning the adjusting needles out (coun- terclockwise) 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 is adjusted properly (see “TO ADJUST THROTTLE CONTROL CABLE” in the Service and Adjustments section of this manual).

•With engine off turn idle fuel adjusting needle in (clock- wise) closing it finger tight and then turn out (counter- clockwise) 1 turn.

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.

•The high idle is set at the factory and cannot be adjusted.

•Idle speed setting - With throttle control lever in slow () position, engine should idle at 1200 RPM. If engine idles too slow or fast, turn idle speed adjusting screw in or out until correct idle is attained.

•Idle fuel needle setting - With throttle control lever in slow () position, turn idle fuel adjusting needle in (clockwise) until engine speed decreases and then turn out (counterclockwise) approximately 3/4 turn to obtain the best low speed performance.

•Recheck idle speed. Readjust if necessary.

ACCELERATION TEST -

•Move throttle control lever from slow ( ) to fast () position. If engine hesitates or dies, turn idle fuel adjusting needle out (counterclockwise) 1/8 turn. Re- peat 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 SETTING CAN BE DANGEROUS. IF YOU THINK THE ENGINE-GOVERNED HIGH SPEED NEEDS ADJUSTING, CONTACT YOUR N E A R E S T A U T H O R I Z E D S E R V I C E C E N T E R / DEPARTMENT, WHICH HAS PROPER EQUIPMENT AND E X P E R I E N C E T O M A K E A N Y N E C E S S A R Y ADJUSTMENTS.

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Contents GTH220 Safety Rules Safe Operation Practices for Ride-On MowersCustomer Responsibilities Product SpecificationsModel Number GTH220 Serial Table of Contents Contents of Hardware Pack Assembly Tools Required for AssemblyTo Remove Tractor from Carton Before Rolling Tractor OFF SkidInstall Seat See Fig To Attach Nose Roller See FigCheck Tire Pressure Check Brake SystemCheck Deck Levelness Install Mower and Drive Belt See FigsCheck for Proper Position of ALL Belts Checklist To Attach Front Bumper See FigUnlocked OperationLock Locked Reverse Neutral High LOW Height Adjustment Knob Used to adjust the mower height Know Your TractorHOW to USE Your Tractor To Adjust Gauge Wheels See Fig To Operate Mower See FigsTo Operate on Hills To Transport See FigsIndicator Lights Before Starting the EngineCheck Engine OIL Level See Fig ADD GasolineMowing Tips Purge TransmissionLubrication Chart Customer ResponsibilitiesGeneral Recommendations Before Each USEBattery TractorBrake Operation TiresEngine Transaxle CoolingTransaxle Pump Fluid BeltsCleaning Clean AIR INTAKE/COOLING AreasEngine OIL Filter MufflerService and Adjustments To Install MowerTo Level Mower Housing To Remove Mower See FigFRONT-TO-BACK Adjustment See Figs To Replace Mower Drive BeltTo Adjust Attachment Clutch See Fig To Replace Mower Blade Drive Belt See FigTo Adjust Brake See Fig Belt InstallationTo Replace Motion Drive Belt See Fig Belt RemovalTo Adjust Motion Control Lever See Fig Transmission REMOVAL/REPLACEMENTTo Adjust Steering Wheel Alignment Front Wheel TOE-IN AdjustmentTo Start Engine with a Weak Battery See Fig Front Wheel CamberTo Remove Wheel for Repairs See Fig To Attach Jumper CablesTo Adjust Attachment Lift Spring See Fig To Remove Hood and Grill Assembly See FigTo Replace Headlight Bulb Interlocks and RelaysTo Adjust Throttle Control Cable See Fig To Adjust Choke Control See FigsTo Adjust Carburetor See Fig Preliminary SettingFinal Setting Acceleration TestStorage OtherFuel System Engine OILTroubleshooting Points Problem Cause CorrectionOFF Service Notes Schematic Tractor Model NO. GTH220 954830167ARepair Parts ElectricalKEY Part NO. NO. Description 47120 Chassis and Enclosures KEY Part DescriptionGround Drive Repair Parts Steering Assembly 532124415 Wheel, Steering 532137094 Engine KEY Part NO. NO. Description Seat Assembly Decals Wheels & TiresGBD48 GSB42Lift Assembly Nut, Special Mower Deck KEY Part Description Transaxle Hydro Gear Model Number AYP Description Transaxle PUMP- Model Number BDU-10L-118 Service Notes Sighting Guide CUT This OUT Dotted Is a SlopeWarranty Statement Limited Warranty532150629 08.17.95 Kfsw
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