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.
Place PTO lever (button) in disengaged (Blade Stop) position.
Engage parking brake.
Connect wire(s) to spark plug.
Throttle control not in correct position Place throttle lever to fast or choke (if so equipped).
Choke not activated.
Fuel tank empty, or stale fuel.
Blocked fuel line.
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.
Faulty spark plug.
Engine flooded.
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.
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.
Vent in gas cap plugged.
Water or dirt in fuel system.
Dirty air cleaner.
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 Spark plug gap too close.
RPM
Remove spark plug and reset the gap to .030”.
Idles poorly
Spark plug fouled, faulty or gap too
Replace spark plug. Set plug gap to .030”.
wide.
Dirty air cleaner.
Replace air cleaner cartridge/element or clean pre-cleaner, if
so equipped.
Excessive vibration
Cutting blade loose or unbalanced or Tighten blade and spindle. Balance blade.
damaged.
Replace blade.
Mower will not mulch
grass
Engine speed low.
Wet grass.
Excessively high grass.
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.
Dull blade.
Uneven cut
Deck not balanced properly.
Dull blade.
Perform side-to-side deck adjustment.
Sharpen or replace blade.
Uneven tire pressure.
Check tire pressure in all four tires.
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| Categories | Lawn Mower Manual, MTD Lawn Mower Manuals, Yard Machines Lawn Mower Manuals |
|---|---|
| Download File |
|
| Document Type | Owner's Manual |
| Language | English |
| Product Brand | MTD, Lawn Mower |
| Product Type | Walk Behind Mower |
| Document File Type | |
| Publisher | mtdproducts.com |
| Wikipedia's Page | MTD Products |
| Copyright | Attribution Non-commercial |
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