Troy-Bilt OEM-390-679 manual Troubleshooting, Problem Cause Remedy

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SECTION 8: TROUBLESHOOTING

Problem

 

Cause

 

Remedy

 

 

 

 

 

Engine fails to start.

1.

Fuel tank empty, or stale fuel.

1.

Fill tank with fresh gasoline.

 

2.

Blocked fuel line.

2.

Clean the fuel line.

 

3.

Choke not in ON position

3.

Move switch to ON position

 

4.

Faulty spark plug.

4.

Clean, adjust gap or replace.

 

5.

Safety key not in ignition switch on engine.

5.

Insert the key fully into the switch.

 

6.

Spark plug wire disconnected.

6.

Connect spark plug wire.

 

7.

Primer button not being used properly.

7.

Refer to the engine manual.

Engine runs erratic.

1.

Unit running on CHOKE.

1.

Move choke lever to OFF position.

 

2.

Blocked fuel line or stale fuel.

2.

Clean fuel line and fill tank with clean, fresh

 

 

 

 

gasoline.

 

3.

Water or dirt in fuel system.

3.

Drain fuel tank and carburetor. Refill with

 

 

 

 

fresh fuel.

 

4.

Carburetor out of adjustment.

4.

Refer to the engine manual.

Loss of power.

1.

Spark plug wire loose.

1.

Connect and tighten spark plug wire.

 

2.

Gas cap vent hole plugged.

2.

Remove ice and snow from gas cap. Be

 

 

 

 

certain vent hole is clear.

 

3.

Exhaust port plugged.

3.

Refer to the engine manual.

Engine overheats.

1.

Carburetor not adjusted properly.

1.

Refer to the engine manual or have the

 

 

 

 

carburetor adjusted by an authorized

 

 

 

 

engine service dealer.

Excessive vibration.

1.

Loose parts or damaged auger.

1.

Stop engine immediately and disconnect

 

 

 

 

spark plug wire. Tighten all bolts and nuts. If

 

 

 

 

vibration continues, have unit serviced by

 

 

 

 

an authorized service dealer.

Unit fails

1.

Traction control cable in need of adjustment.

1.

Adjust traction control cable. Refer to

to propel itself.

 

 

 

Adjustments.

 

2.

Drive belt loose or damaged.

2.

Replace drive belt.

Unit fails

1.

Discharge chute clogged.

1.

Stop engine immediately and disconnect

to discharge snow.

 

 

 

spark plug wire. Clean discharge chute and

 

 

 

 

inside of auger housing.

 

2.

Foreign object lodged in auger.

2.

Stop engine immediately and disconnect

 

 

 

 

spark plug wire. Remove object from auger.

 

3.

Auger control cable in need of adjustment.

3.

Refer to Auger Control Test, Operating Your

 

 

 

 

Snowthrower Section.

 

4.

Auger belt loose or damaged.

4.

Refer to Maintenance Section

 

5.

Shear pin(s) sheared.

5.

Replace shear pin(s).

NOTE: For repairs beyond minor adjustments listed above, contact the local dealer.

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Contents Operator’s Manual Table of Contents Important Safe Operation Practices TrainingMaintenance And Storage Do not modify engineAssembling Your Snow Thrower Clean-Out Tool Know Your SnowthrowerDrive Control / Auger Control Lock Auger Drive Control Heated Handles Switch on some modelsChute Crank Shift LeverOperating Your Snow Thrower To Engage Augers To Stop EngineTo Engage Drive Recoil StarterDrift Cutters If Equipped Auger Control TestAuger Control Chute AssemblyOperating Tips Drive Control and Shift LeverShift Rod Adjustment Maintaining Your Snow Thrower CarburetorLubrication Servicing Your Snow Thrower AugersShave Plate and Skid Shoes Belt Removal And Replacement Auger BeltsReplacing Friction Wheel Rubber Drive BeltEngine Off-Season StorageTroubleshooting Problem Cause RemedyTWO Year Supreme Warranty