TROUBLE SHOOTING

PROBLEM

 

POSSIBLE CAUSE(S)

 

CORRECTIVE ACTION

 

 

 

 

Engine fails to start

1. Blade control handle disengaged.

1.

Engage blade control handle.

 

2.

Spark plug wire disconnected.

2.

Connect spark plug wire.

 

3.

Fuel tank empty, or stale fuel.

3.

Fill tank with clean, fresh gasoline.

 

4.

Blocked fuel line.

4.

Clean the fuel line.

 

5.

Faulty spark plug.

5.

Clean, adjust gap or replace.

 

6.

Engine flooded.

6.

Wait a few minutes to restart, but do not prime.

Engine runs erratic

1. Spark plug wire loose.

1.

Connect and tighten spark plug wire.

 

2.

Blocked fuel line or stale fuel.

2.

Clean the fuel line; fill the tank with clean, fresh

 

 

 

 

gasoline.

 

3.

Vent in gas cap plugged.

3.

Clear vent.

 

4.

Water or dirt in fuel system.

4.

Drain the fuel tank and carburetor. Refill with

 

 

 

 

fresh fuel.

 

5.

Dirty air cleaner.

5.

Clean air cleaner.

 

6.

Carburetor out of adjustment.

6.

Adjust carburetor.

Engine overheats

1. Engine oil level low.

1.

Fill crankcase with proper oil.

 

2.

Air flow restricted.

2.

Remove blower housing and clean.

 

3.

Carburetor not adjusted properly.

3.

Adjust carburetor.

Idles poorly

1. Spark plug fouled, faulty or gap too

1.

Reset gap to .030" or replace spark plug.

 

 

wide.

 

 

 

2.

Carburetor improperly adjusted.

2.

Adjust carburetor.

 

3.

Dirty air cleaner.

3.

Clean air cleaner.

Excessive vibration

1. Cutting blade loose or unbalanced.

1.

Tighten blade and adapter. Balance blade.

 

2.

Bent cutting blade.

2.

Replace blade.

Mower will not

1. Wet grass.

1.

Do not mow when grass is wet; wait until later to

mulch grass

 

 

 

cut.

 

2.

Excessively high grass.

2.

Mow once at a high cutting height, then mow

 

 

 

 

again at desired height or make a narrower cut-

 

 

 

 

ting path.

 

3.

Dull blade.

3.

Sharpen or replace blade.

Uneven cut

1. Wheels not positioned correctly.

1.

Place all four wheels in same height position.

 

2.

Dull blade.

2.

Sharpen or replace blade.

Wheels will not

1. Belt not installed properly.

1.

Check belt for proper pulley installation and

propel

 

 

 

movement.

 

2.

Debris clogging drive operation.

2.

Clean out debris.

NOTE: For repairs beyond the minor adjustments listed above, contract your nearest authorized service dealer.

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Troy-Bilt 400 Series manual Trouble Shooting, Problem Possible Causes Corrective Action