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SECTION 8: TROUBLESHOOTING
Engine fails to start
Engine runs erratic
Engine overheats
Engine hesitates at high
RPM
Idles poorly
1.
PTOtever/knobengaged.
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 in fuel system.
6.
Dirty air cleaner.
1.
Engine oil level low.
2.
Air flow restricted.
1.
Spark plug gap too close.
1.
Spark plug fouled, faulty or gap too
wide.
2.
Dirty air cleaner.
1.
Place PTO lever/knob 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, fresh 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, fresh 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.
1.
Fill crankcase with proper capacity and weight of
oil.
2.
Clean grass clippings and debris from around the
engine's cooling fins and blower housing.
1.
Remove spark plug(s) and reset the gap at .030".
1,
2.
Replace spark plug(s). Set plug gap at .030".
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.
1.
Engine speed too low.
2.
Wet grass.
3.
Excessively high grass.
Mower will not mulch
grass
Uneven cut
4.
Dull blade.
1.
Deck not balanced properly.
2.
Dull blade.
3.
Uneven tire pressure.
1.
Place throttle in FAST (rabbit) position.
2.
Do not mow when grass is wet; wait until later to
cut.
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.
1.
Perform side-to-side deck adjustment.
2.
Sharpen or replace blade.
3.
Check tire pressure in all four tires.
NOTE: For unsolved problems and/or further details, visit www.mtdproducts, com or call the Customer Support Line
at 1-800-800-7310.
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