Problem
Cause
Remedy
Engine fails to start
1. PTO/Blade Engage knob engaged.
2. Parking brake not engaged.
3. Spark plug wire(s) disconnected.
4. Throttle/choke control lever not in correct starting
position.
5. Choke not activated.
6. Fuel tank empty, or stale fuel.
7. Blocked fuel line.
8. Faulty spark plug(s).
9. Engine flooded.
10. Fuse(s) blown.
1. Place knob in disengaged (OFF) position.
2. Engage parking brake.
3. Connect wire(s) to spark plug(s).
4. Place throttle/choke lever to FAST position.
5. Activate choke.
6. Fill tank with clean, fresh (less than 30 days old)
gas.
7. Clean fuel line and replace fuel filter.
8. Clean, adjust gap or replace plug(s).
9. Crank engine with throttle in FAST position.
10. Replace fuse.
Engine runs erratic
1. Tractor running with CHOKE activated.
2. Spark plug wire(s) loose.
3. Blocked fuel line or stale fuel.
4. Vent in gas cap plugged.
5. Water or dirt in fuel system.
6. Dirty air cleaner.
1. Deactivate the choke.
2. Connect spark plug wire(s).
3. Clean fuel line; fill tank with clean, fresh gasoline
and replace fuel filter.
4. 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.
Engine overheats
1. Engine oil level low.
2. Air flow restricted.
1. Fill crankcase with proper amount and weight of
oil.
2. Clean grass clippings and debris from around the
engine’s cooling fins and blower housing.
Engine hesitates at high
RPM
1. Spark plug(s) gap too close.
1. Remove spark plug(s) and reset the gap.
Engine Idles rough
1. Spark plug(s) fouled, faulty or gap too wide.
2. Dirty air cleaner.
1. Replace spark plug(s). Set plug gap.
2. Replace air cleaner element and/or clean pre-
cleaner.
Excessive vibration
1. Cutting blade loose or unbalanced.
2. Damaged or bent cutting blade.
1. Tighten blade and spindle.
2. Replace blade.
Mower will not mulch grass
1. Engine speed too low.
2. Wet grass.
3. Excessively high grass.
4. Dull blade.
1. Place throttle in FAST (rabbit) position.
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.
4. Sharpen or replace blade.
Uneven cut
1. Deck not leveled properly.
2. Dull blade.
3. Uneven tire pressure.
1. Perform side-to-side deck adjustment.
2. Sharpen or replace blade.
3. Check tire pressure in all four tires.
Troubleshooting
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Summary of Contents for 13AP91GS897
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