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SECTION9: TROUBLESHOOTING
Engine fails to start
Engine runs erratic
1. PTOlever engaged.
2. Parking brake not engaged.
3. Spark plug wire(s) disconnected.
4. Throttle control lever not in correct
starting position.
5. Fuel tank empty, or stale fuel.
6. Blocked fuel line.
7. Faulty spark plug.
8. Engine flooded.
1. Unit running with CHOKE applied.
2. Spark plug wire loose.
3. Blocked fuel line or stale fuel.
4. Vent in gas cap plugged.
5. Water or dirt infuel system.
6. Dirty air cleaner.
1. Place PTOlever in OFF position.
2. Engage parking brake.
3. Connect wire(s) to spark plug.
4. Place throttle lever to CHOKE position.
5. Fill tank with clean, flesh gas.
6. Clean fuel line or replace fuel filter, if so
equipped.
7. Clean, adjust gap or replace plug.
8. Crank engine with throttle in FAST position.
1. Place throttle lever in FAST position.
2. Connect and tighten spark plug wire.
3. Clean fuel line; fill tank with clean, flesh gas.
Replace fuel filter, if so equipped.
4. Clear vent or replace cap if damaged.
5. Drain fuel tank. Refill with clean, fresh gas.
6. Replace air cleaner cartridge or clean pre-
cleaner, if so equipped.
Engine overheats 1. Engine oil level low. 1. Fill crankcase with proper capacity and weight of
oil.
2. Air flow restricted. 2. Clean grass clippings and debris from around the
engine's cooling fins and blower housing.
Engine hesitates at high 1. Spark plug gap too close. 1. Remove spark plug(s) and reset the gap at .030".
RPM
Idles poorly 1. Spark plug fouled, faultyor gap too 1. Replace spark plug(s). Set plug gap at .030".
wide.
2. Dirty air cleaner. 2. Replace air cleaner cartridge or clean pre-
cleaner, if so equipped.
Excessive vibration 1. Cutting blade loose, unbalanced or 1. Tighten blade and spindle, balance blade and/or
damaged, replace blade.
Mower will not mulch 1. Engine speed too low. 1.
grass 2. Wet grass. 2.
3. Excessively high grass.
3,
4. Dull blade. 4.
Uneven cut 1. Deck not balanced properly. 1. Perform side-to-side deck adjustment.
2. Dull blade. 2. Sharpen or replace blade.
3. Uneven tire pressure. 3. Check tire pressure in all four tires.
Place throttle in FAST (rabbit) position,
Do not mow when grass is wet; wait until later to
cut.
Mow once at a high cutting height, then mow
again at desired height or make a narrower
cutting swath.
Sharpen or replace blade.
23
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