MTD 993 manual Trouble Shooting Guide, Trouble Possible Causes Corrective Action

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SECTION 11: TROUBLE SHOOTING GUIDE

Trouble

Possible Cause(s)

Corrective Action

 

 

 

Engine fails to start

Fuel tank empty, or stale fuel.

Fill tank with clean, fresh gasoline. Fuel will not last over thirty

 

 

days unless a fuel stabilizer is used.

 

Blocked fuel line.

Clean fuel line.

 

Choke not in ON position

Move switch to ON position

 

Faulty spark plug.

Clean, adjust gap or replace.

 

Key not in switch on engine.

Insert key.

 

Spark plug wire

Connect spark plug wire.

 

disconnected.

 

 

Primer button not depressed.

Refer to the engine manual packed with your unit.

 

Fuel shut-off valve closed

Open fuel shut-off valve.

Engine runs erratic

Unit running on CHOKE.

Move choke lever to OFF position.

 

Blocked fuel line or stale fuel.

Clean fuel line; fill tank with clean fresh gasoline. Fuel will not last

 

 

over thirty days unless a fuel stabilizer is used.

 

Water or dirt in fuel system.

Drain fuel tank. Refill with fresh fuel.

 

Carburetor out of adjustment.

Refer to the engine manual packed with your unit or have

 

 

carburetor adjusted by an authorized service dealer.

Loss of power

Spark plug wire loose.

Connect and tighten spark plug wire.

 

Gas cap vent hole plugged.

Remove ice and snow from cap. Be certain vent hole is clear.

 

Exhaust port plugged.

Clean-see Maintenance section of engine manual.

Engine overheats

Carburetor not adjusted

Refer to the engine manual packed with your unit or have

 

properly.

carburetor adjusted by an authorized service dealer.

Excessive vibration

Loose parts or damaged

Stop engine immediately and disconnect spark plug wire. Tighten

 

auger.

all bolts and nuts. Make all necessary repairs. If vibration

 

 

continues, have unit serviced by an authorized service dealer.

Unit fails to propel

Incorrect adjustment of drive

Adjust drive cable. Refer to Adjustment section of this manual.

itself

cable.

Replace drive belt. Refer to Belt Replacement in Maintenance

 

Drive belt loose or damaged.

section of this manual.

Unit fails to

Discharge chute clogged.

Stop engine immediately and disconnect spark plug wire. Clean

discharge snow

 

discharge chute and inside of auger housing.

 

Foreign object lodged in

Stop engine immediately and disconnect spark plug wire.

 

auger.

Remove object from auger.

 

Incorrect adjustment of drive

Adjust drive cable. Refer to Adjustment section of this manual.

 

cable.

Replace drive belt. Refer to Belt Replacement in Maintenance

 

Drive belt loose or damaged.

section of this manual.

Note: For repairs beyond the minor adjustments above, contact your local authorized service dealer.

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Contents OPERATOR’S Manual Copy the model number here Finding Your Model NumberCalling Customer Support Copy the serial number herePreparation Important Safe Operation PracticesTraining OperationMaintenance and Storage Safety Labels Found on Snow ThrowerSET-UP Instructions Auger Shear BoltsSkid Shoe Adjustment See Figure Final AdjustmentsAuger and Traction Control Clutch Adjustment Shift Lever Adjustment See FigureChute Directional Control ControlsShift Lever Traction CONTROL/AUGER Clutch LockTo Start Engine OperationGAS and OIL FILL-UP Adjustments Lubrication Augers MaintenanceBelt Removal and Replacement Shave Plate and Skid ShoesDrive Belt Spacer OFF-SEASON StorageChanging the Friction Wheel Support Bracket ShaftTrouble Shooting Guide Trouble Possible Causes Corrective ActionModel 193 6478 Model Model Model Model Model Model Model MANUFACTURER’S Limited Warranty for