SECTION 8: TROUBLESHOOTING

Trouble

Possible Cause(s)

Corrective Action

 

 

 

Engine fails to start

PTO switch engaged.

Disengage PTO switch.

 

Brake pedal not engaged.

Engage brake pedal.

 

Spark plug wire disconnected.

Connect wire to spark plug.

 

Throttle control lever not in correct

Move throttle lever to FAST or START posi-

 

starting position.

tion.

 

Fuel tank empty, or stale fuel.

Fill tank with clean, fresh (not over 30 days)

 

 

gasoline.

 

Blocked fuel line.

Clean fuel line.

 

Faulty spark plug.

Clean, adjust gap or replace.

 

Engine flooded.

Crank engine with throttle in FAST position.

Engine runs erratic

Unit running in START position.

Move throttle lever to FAST position.

 

Choke lever toward ON position.

Push choke lever to OFF position.

 

Spark plug wire loose.

Connect and tighten spark plug wire.

 

Blocked fuel line or stale fuel.

Clean fuel line; fill tank with clean, fresh (not

 

 

over 30 days) gasoline.

 

Vent in gas cap plugged.

Clear vent.

 

Water or dirt in fuel system.

Drain fuel tank. Refill with fresh fuel.

 

Dirty air cleaner.

Clean air cleaner.

Engine overheats

Engine oil level low.

Fill crankcase with proper oil.

 

Air flow restricted.

Remove blower housing and clean.

Occasional skip (hesitates) at

Spark plug gap too close.

Adjust gap to .030”.

high speed

 

 

Idles poorly

Spark plug fouled, faulty or gap too

Reset gap to .030” or replace spark plug.

 

wide.

 

 

Dirty air cleaner.

Clean air cleaner.

Excessive vibration

Cutting blade loose or unbalanced.

Tighten blade and adapter. Balance blade.

 

Bent cutting blade.

Replace blade.

Mower will not mulch grass

Engine speed too low.

Set throttle at full throttle.

 

Wet grass.

Do not mow when grass is wet; wait until

 

 

later to cut.

 

Excessively high grass.

Mow once at a high cutting height, then

 

 

mow again at desired height or make a nar-

 

 

rower cutting swath (1/2 width).

 

Dull blade.

Sharpen or replace blade.

Uneven cut

Wheels not positioned correctly.

Place all four wheels in same height posi-

 

 

tion.

 

Dull blade.

Sharpen or replace blade.

 

Uneven tire pressure.

Equal tire pressure in all four wheels.

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Yard-Man 53AA1A3G401 manual Troubleshooting, Trouble Possible Causes Corrective Action

53AA1A3G401 specifications

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