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