TROUBLESHOOTING
Problem
Cause
Remedy
Engine fails to start
1. Blade control disengaged.
2. Spark plug boot disconnected.
3. Fuel tank empty or stale fuel.
4. Engine not primed (If equipped with
primer).
5. Faulty spark plug.
6. Engine flooded.
1. Engage blade control.
2. Connect wire to spark plug boot.
3. Fill tank with clean, fresh gasoline.
4. Prime engine as instructed in the
Operation section of the Engine Manual.
5. Clean, adjust gap, or replace.
6. Wait a few minutes to restart.
Engine runs erratic
1. Spark plug boot loose.
2. Stale fuel.
3. Vent in gas cap plugged.
4. Water or dirt in fuel system.
5. Dirty air cleaner.
6. Blocked fuel line.
1. Connect and tighten spark plug boot.
2. Fill tank with clean, fresh gasoline.
3. Clear vent.
4. Run engine until it stops from lack of fuel.
Refill with fresh fuel.
5. Refer to Air Cleaner Maintenance in the
Engine Manual.
6. Contact your Parts & Repair Center to
have fuel line cleaned.
Engine overheats
1. Engine oil level low.
2. Air flow restricted.
1. Fill crankcase with proper oil.
2. Clean area around and on top of engine.
Idles poorly
1. Spark plug fouled, faulty, or gap too
wide.
2. Dirty air cleaner.
1. Reset gap or replace spark plug.
2. Refer to Air Cleaner Maintenance in the
Engine Manual.
Excessive vibration
1. Cutting blade loose or unbalanced.
2. Bent cutting blade.
1. Tighten blade and adapter. Balance blade.
2. Replace blade.
Mower will not mulch
grass
1. Wet grass.
2. Excessively high grass.
3. Dull blade.
1. Do not mow when grass is wet; wait until
dry to cut.
2. Mow once at a high cutting height, then
mow again at desired height or make a
narrower cutting path.
3. Sharpen or replace blade.
Uneven cut
1. Buildup of grass, leaves and debris
under mower.
2. Dull blade.
1. Clean underside of mower housing.
2. Sharpen or replace blade.
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Walk-Behind Lawn Mower
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Operator’s Manual
Troubleshooting
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