Husqvarna LTH125 owner manual To Adjust Throttle Control Cable See, To Adjust Carburetor See Fig

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SERVICE AND ADJUSTMENTS

ENGINE

TO ADJUST THROTTLE CONTROL CABLE (See Fig.33)

The throttle control has been preset at the factory and adjustment should not be necessary. Check adjustment as described below before loosening cable. If adjustment is necessary, proceed as follows:

With engine not running, move throttle control lever

from slow () to choke () position. Slowly move lever from choke () to fast () position.

Check that holes “A” in governor control lever and hole in governor plate line-up. If holes “A” are not aligned, loosen clamp screw and move throttle cable until holes are aligned. Tighten clamp screw securely.

GOVERNOR

GOVERNOR

CONTROL LEVER

CONTROL PLATE

 

HOLES “A”

CLAMP

THROTTLE

 

SCREW

CABLE

 

 

FIG. 33

TO ADJUST CARBURETOR (See Fig. 34)

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 idle mixture valve in (clockwise) de- creases the supply of fuel to the engine giving a leaner fuel/ air mixture. Turning the idle mixture valve out (counter- clockwise) increases the supply of fuel to the engine giving a richer fuel/air mixture.

IMPORTANT: DAMAGE TO THE NEEDLE VALVE AND THE SEAT IN CARBURETOR MAY RESULT IF SCREW IS TURNED IN TOO TIGHT.

PRELIMINARY SETTING -

Air cleaner assembly must be assembled to the carbu- retor when making carburetor adjustments.

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

With engine off turn idle mixture valve in (clockwise) closing it finger tight and then turn out (counterclock- wise) 1 full 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.

Move throttle control lever to slow () position. With finger, rotate and hold throttle lever against idle speed screw. Turn idle speed screw to attain 1750 RPM.

While still holding throttle lever against idle speed screw, turn idle mixture valve in (clockwise) until en- gine begins to die and then turn out (counterclockwise) 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. If engine hesitates or dies, turn idle mixture valve out (counterclockwise) 1/8 turn. Repeat test and continue to adjust, if necessary, until engine acceler- ates 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 F ACTOR Y HI GH SP EED SETTI NG C AN BE DANGEROUS. IF YOU THINK THE ENGINE-GOVERNED HIGH SPEED NEEDS ADJUSTING, CONTACT YOUR NEA RE ST A UT HOR IZ ED S ERV IC E CE NT ER/ DEPARTMENT, WHICH HAS PROPER EQUIPMENT AND EXP ER IEN CE TO MA KE AN Y N ECE SS ARY ADJUSTMENTS.

THROTTLE

IDLE SPEED

LEVER

SCREW

IDLE MIXTURE

VALVE

FIG. 34

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Contents LTH125 Safe Operation Practices for Ride-On Mowers Safety RulesCustomer Responsibilities Product SpecificationsModel Number LTH125 Serial Table of Contents Contents of Hardware Pack Tools Required for Assembly AssemblyTo Remove Tractor from Carton Before Rolling Tractor OFF SkidCheck Tire Pressure HOW to SET UP Your TractorCheck Deck Levelness Check for Proper Position of ALL BeltsInstall Battery See Figs To Convert to Bagging or Discharging Install Mulcher Plate See Figs.6Know Your Tractor OperationHOW to USE Your Tractor To Operate on Hills Before Starting the EngineADD Gasoline Page Mulching Mowing Tips Mowing TipsCustomer Responsibilities Lubrication ChartGeneral Recommendations Before Each USEBrake Operation TractorTires Blade CareTo Clean Battery and Terminals Battery See FigBelts Transaxle CoolingEngine Clean AIR Screen See FigLubrication AIR Filter See FigEngine Cooling Fins See Fig CleaningMuffler Spark PlugsTo Install Mower See Fig Service and AdjustmentsTo Remove Mower See Fig FRONT-TO-BACK Adjustment See Figs To Level Mower HousingBelt Installation To Adjust Brake See FigTo Replace Mower Blade Drive Belt See Fig To Replace Motion Drive Belt SeeTransmission REMOVAL/REPLACEMENT To Adjust Motion Control Lever SeeTo Adjust Steering Wheel Alignment Front Wheel TOE-IN/CAMBERTo Remove Hood and Grill Assembly See To Start Engine with a Weak Battery See FigTo Replace Fuse To Replace Headlight BulbTo Adjust Carburetor See Fig To Adjust Throttle Control Cable SeePreliminary Setting Final SettingOther StorageProblem Cause Correction Troubleshooting PointsOFF Schematic Electrical TRACTOR- -MODEL NO. LTH125 HC125H42CKEY Part Description NO. no Chassis and Enclosures KEY Part Description Drive Repair Parts Steering and Front Axle Repair Parts Engine Repair Parts Seat LSB42 Wheels and TiresLBD48 Lift KEY Part NO. NO. Description Page Mower Deck HYDRO-GEAR Transaxle Model no KEY Part NO. no Description Service Notes Service Notes Page Husqvarna Forest & Garden CO Warranty StatementRev