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SECTION 8: TROUBLESHOOTING
Trouble Possible Cause(s) Corrective Action
Engine fails to start PTO switch engaged.
Brake pedal not engaged.
Spark plug wire disconnected.
Throttle control lever not in correct
starting position.
Fuel tank empty, or stale fuel.
Blocked fuel line.
Faulty spark plug.
Engine flooded.
Disengage PTO switch.
Engage brake pedal.
Connect wire to spark plug.
Move throttle lever to FAST or START posi-
tion.
Fill tank with clean, fresh (not over 30 days)
gasoline.
Clean fuel line.
Clean, adjust gap or replace.
Crank engine with throttle in FAST position.
Engine runs erratic Unit running in START position.
Choke lever toward ON position.
Spark plug wire loose.
Blocked fuel line or stale fuel.
Vent in gas cap plugged.
Water or dirt in fuel system.
Dirty air cleaner.
Move throttle lever to FAST position.
Push choke lever to OFF position.
Connect and tighten spark plug wire.
Clean fuel line; fill tank with clean, fresh (not
over 30 days) gasoline.
Clear vent.
Drain fuel tank. Refill with fresh fuel.
Clean air cleaner.
Engine overheats Engine oil level low.
Air flow restricted.
Fill crankcase with proper oil.
Remove blower housing and clean.
Occasional skip (hesitates) at
high speed
Spark plug gap too close. Adjust gap to .030”.
Idles poorly Spark plug fouled, faulty or gap too
wide.
Dirty air cleaner.
Reset gap to .030” or replace spark plug.
Clean air cleaner.
Excessive vibration Cutting blade loose or unbalanced.
Bent cutting blade.
Tighten blade and adapter. Balance blade.
Replace blade.
Mower will not mulch grass Engine speed too low.
Wet grass.
Excessively high grass.
Dull blade.
Set throttle at full throttle.
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 nar-
rower cutting swath (1/2 width).
Sharpen or replace blade.
Uneven cut Wheels not positioned correctly.
Dull blade.
Uneven tire pressure.
Place all four wheels in same height posi-
tion.
Sharpen or replace blade.
Equal tire pressure in all four wheels.