Husqvarna Troubleshooting Common Issues with Lawn Mower Models

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TROUBLESHOOTING CHART:

See appropriate section in manual unless directed to s service center

 

PROBLEM

 

CAUSE

 

CORRECTION

 

 

 

 

 

 

 

 

 

 

 

 

Mower blades will

 

1.

Obstruction in clutch

 

1.

Remove obstruction.

 

not rotate

 

 

mechanism.

 

 

 

 

 

 

2.

Worn/damaged mower drive

 

2.

Replace mower drive belt.

 

 

 

 

belt.

 

 

 

 

 

 

3.

Frozen idler pulley.

 

3.

Replace idler pulley.

 

 

 

4.

Frozen blade mandrel.

 

4.

Contact a qualified service

 

 

 

 

 

 

 

center.

 

 

 

5.

Mower belt off engine pulley.

 

3.

Install belt on engine pulley.

 

 

 

 

 

 

 

 

 

Poor grass

 

1.

Engine speed too slow.

 

1.

Place throttle control in

 

discharge

 

 

 

 

 

“FAST” position.

 

 

 

2.

Travel speed too fast.

 

2.

Shift to slower speed.

 

 

 

3.

Wet grass.

 

3.

Allow grass to dry before

 

 

 

 

 

 

 

mowing.

 

 

 

4.

Mower not level.

 

4.

Level mower.

 

 

 

5.

Low/uneven tire air pressure.

 

5.

Check tires for proper air

 

 

 

 

 

 

 

pressure.

 

 

 

6.

Worn, bent or loose blade.

 

6.

Replace/sharpen blade.

 

 

 

 

 

 

 

Tighten blade bolt.

 

 

 

7.

Buildup of grass, leaves and

 

7.

Clean underside of mower

 

 

 

 

trash under mower.

 

 

housing.

 

 

 

8.

Mower drive belt worn.

 

8.

Replace mower drive belt.

 

 

 

9.

Blades improperly installed.

 

9.

Reinstall blades sharp edge

 

 

 

 

 

 

 

down.

 

 

 

10. Improper blades used.

 

10. Replace with blades listed

 

 

 

 

 

 

 

in this manual.

 

 

 

11. Clogged mower vent

 

11. Clean around mandrels to

 

 

 

 

holes from buildup of grass,

 

 

open vent holes.

 

 

 

 

leaves, and trash around

 

 

 

 

 

 

 

mandrels.

 

 

 

 

 

 

 

 

 

 

 

 

Headlight(s) not

 

1.

Light switch is “OFF”.

 

1.

Turn light switch “ON”.

 

working

 

2.

Bulb(s) or lamp(s) burned out.

 

2.

Replace bulb(s) or lamp(s).

 

(if so equipped)

 

3.

Faulty light switch.

 

3.

Check/replace light switch.

 

 

 

4.

Loose or damaged wiring.

 

4.

Check wiring and connections.

 

 

 

5.

Blown fuse.

 

5.

Replace fuse.

 

 

 

 

 

 

 

 

 

Battery will not

 

1.

Bad battery cell(s).

 

1.

Replace battery.

 

charge

 

2.

Poor cable connections.

 

2.

Check/clean all connections.

 

 

 

3.

Faulty regulator

 

3.

Replace regulator.

 

 

 

 

(if so equipped).

 

 

 

 

 

 

4.

Faulty alternator.

 

4.

Replace alternator.

 

 

 

 

 

 

 

 

 

Loss of drive

 

1.

Freewheel control in

 

1.

Place freewheel control in

 

 

 

 

“disengaged” position.

 

 

“engaged” position.

 

 

 

2.

Motion drive belt worn,

 

2.

Replace motion drive belt.

 

 

 

 

damaged, or broken.

 

 

 

 

 

 

3.

Air trapped in transmission

 

3.

Purge transmission.

 

 

 

 

during shipment or servicing.

 

 

 

 

 

 

 

 

 

 

 

 

Engine “backfires”

 

1.

Engine throttle control not set

 

1.

Move throttle control

 

when turning

 

 

between half and full speed

 

 

between half and full speed

 

engine “OFF”

 

 

(fast) position before stopping

 

 

(fast) position before

 

 

 

 

engine.

 

 

stopping engine.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Contents LOYTH20F42T Safety Rules General OperationIII. Children ServiceII. Slope Operation IV. TowingGeneral Service Table of Contents ASSEMBLY/PRE-OPERATION Unassembled PartsTo Remove Tractor from Carton Check Deck Levelness ChecklistCheck Tire Pressure Check for Proper Position of ALL BeltsOperation Know Your Tractor Attachment Clutch SwitchService Reminder / Hour Meter THROTTLE/CHOKE ControlStopping HOW to USE Your TractorTo SET Parking Brake To USE Throttle Control DSystem Characteristics To Move Forward BackwardTo USE Cruise Control Reverse Operation System ROS Using the Reverse Operation SystemTo Operate Mower To Operate on HillsTowing Carts and Other ATTACH- Ments Service REMINDER/HOUR MeterBefore Starting the Engine Check Engine OIL LevelTo Start Engine Purge TransmissionMowing Tips Maintenance Lubrication ChartTractor Transaxle Cooling Transaxle Pump FluidEngine BeltsCleaning Service and Adjustments To Install MowerTractor To Remove Mower Page Visual SIDE-TO-SIDE Adjustment Precision SIDE-TO-SIDE AdjustmentTo Level Mower To Adjust Attachment Clutch To Replace Mower Drive BeltTo Replace Motion Drive Belt Belt Installation To Check BrakeTo Remove Wheel for Repairs To Replace Headlight Bulb Replacing BatteryTo Start Engine with a Weak BAT- Tery Interlocks and RelaysTo Adjust Throttle Control Cable To Adjust CarburetorTo Remove Hood and Grill AS- Sembly Battery StorageOther Troubleshooting Chart Problem Cause CorrectionExcessive Mower blades will Warranty Limited WarrantySuggested Guide for Sighting Slopes for Safe Operation