Problem
Cause
Remedy
Engine fails to start
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1.
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2.
Spark plug wire(s) disconnected.
3.
Throttle control lever not in correct starting
position.
Choke not activated
5.
Fuel tank empty, or stale fuel.
6.
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Faulty spark plug(s).
8.
Engine flooded.
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1.
Engage parking brake.
2.
Connect wire(s) to spark plug(s).
3.
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5.
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Fill tank with clean, fresh (less than 30 days
6.
old) gas.
Clean fuel line and replace fuel filter.
Clean, adjust gap or replace plug(s).
8.
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Engine runs erratic
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1.
Spark plug wire(s) loose.
2.
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3.
Vent in gas cap plugged.
Water or dirt in fuel system.
5.
Dirty air cleaner.
6.
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1.
position.
Connect spark plug wire(s).
2.
Clean fuel line; fill tank with clean, fresh
3.
gasoline and replace fuel filter.
Clear vent or replace cap if damaged.
Drain fuel tank. Refill with clean, fresh
5.
gasoline.
Replace air cleaner paper element or clean
6.
foam precleaner.
Engine overheats
Engine oil level low.
1.
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2.
Fill crankcase with proper amount and
1.
weight of oil.
Clean grass clippings and debris from around
2.
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Engine hesitates at high
31.
Spark plug(s) gap too close.
1.
Remove spark plug(s) and reset the gap.
1.
Engine Idles rough
Spark plug(s) fouled, faulty or gap too wide.
1.
Dirty air cleaner.
2.
Replace spark plug(s). Set plug gap.
1.
Replace air cleaner element and/or clean
2.
pre-cleaner.
Excessive vibration
Cutting blade loose or unbalanced.
1.
Damaged or bent cutting blade.
2.
Tighten blade and spindle.
1.
Replace blade.
2.
Mower will not mulch grass
Engine speed too low.
1.
Wet grass.
2.
Excessively high grass.
3.
Dull blade.
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1.
Do not mulch when grass is wet.
2.
Mow once at a high cutting height, then
3.
mow again at desired height or make a
narrower cutting swath.
Sharpen or replace blade.
Uneven cut
Deck not leveled properly.
1.
Dull blade.
2.
Uneven tire pressure.
3.
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1.
Sharpen or replace blade.
2.
Check tire pressure in all four tires.
3.
Troubleshooting
8
