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SECTION 13: TROUBLESHOOTING
Trouble Possible Cause(s) Corrective Action
Engine fails to start PTO lever (button) engaged.
Parking brake not engaged.
Spark plug wire(s) disconnected.
Throttle control not in correct position
Choke not activated.
Fuel tank empty, or stale fuel.
Blocked fuel line.
Faulty spark plug.
Engine flooded.
Place PTO lever (button) in disengaged (Blade Stop) position.
Engage parking brake.
Connect wire(s) to spark plug.
Place throttle lever to fast or choke (if so equipped).
Activate choke.
Fill tank with clean, fresh (less than 30 days old) gas.
Clean fuel line or replace fuel filter, if so equipped.
Clean, adjust gap or replace plug.
Crank engine with throttle in FAST position.
Engine runs erratic Unit running with CHOKE applied.
Spark plug wire loose.
Blocked fuel line or stale fuel.
Vent in gas cap plugged.
Water or dirt in fuel system.
Dirty air cleaner.
Place throttle lever in FAST position.
Connect and tighten spark plug wire.
Clean fuel line; fill tank with clean, fresh (less than 30 days old)
gasoline. Replace fuel filter, if so equipped.
Clear vent or replace cap if damaged.
Drain fuel tank. Refill with clean, fresh (less than 30 days old)
gasoline.
Replace air cleaner cartridge/element or clean pre-cleaner, if
so equipped.
Engine overheats Engine oil level low.
Air flow restricted.
Fill crankcase with proper capacity and weight of oil.
Clean grass clippings and debris from around the engine’s
cooling fins and blower housing.
Engine hesitates at high
RPM
Spark plug gap too close. Remove spark plug and reset the gap to .030”.
Idles poorly Spark plug fouled, faulty or gap too
wide.
Dirty air cleaner.
Replace spark plug. Set plug gap to .030”.
Replace air cleaner cartridge/element or clean pre-cleaner, if
so equipped.
Excessive vibration Cutting blade loose or unbalanced or
damaged.
Tighten blade and spindle. Balance blade.
Replace blade.
Mower will not mulch
grass
Engine speed low.
Wet grass.
Excessively high grass.
Dull blade.
Place throttle in FAST position.
Do not mow when grass is wet; wait until later to cut.
Mow once at a higher cutting height, then mow again at desired
height or make a narrower cutting swath.
Sharpen or replace blade.
Uneven cut Deck not balanced properly.
Dull blade.
Uneven tire pressure.
Perform side-to-side deck adjustment.
Sharpen or replace blade.
Check tire pressure in all four tires.