Manual

SECTION10: TROUBLESHOOTINGGUIDE
Trouble Corrective Action
Engine fails to start
Engine runs erratic
Possible Cause(s)
1. Blade control handle
disengaged.
2. Spark plug wire disconnected.
3. Engine not primed.
4. Fuel tank empty, or stale fuel.
5. Blocked fuel line.
6. Faulty spark plug.
7. Engine flooded.
1. Spark plug wire loose.
2. Blocked fuel line or stale fuel.
3. Vent in gas cap plugged.
4. Water or dirt in fuel system.
5. Dirty air cleaner.
6. Carburetor out of adjustment.
Engine overheats 1. Engine oil level low. 1.
2. Air flow restricted. 2.
3. Carburetor not adjusted 3.
properly.
Occasional skip (hesitates) 1. Spark plug gap too close. 1. Adjust gap to .030".
at high speed
Idles poorly 1. Spark plug fouled, faulty or 1. Reset gap to .030" or replace spark
gap too wide. plug.
2. Carburetor out of adjustment. 2. Adjust carburetor. Follow engine
manual.
3. Dirty air cleaner. 3. Clean air cleaner.
Excessive vibration 1. Cutting blade loose or 1. Tighten blade and adapter. Balance
unbalanced, blade.
2. Bent cutting blade. 2. Replace blade.
Mower wilt not mulch grass 1. Wet grass. 1. Wait until later to cut.
2. Excessively high grass. 2. Mow once at a high cutting height,
then mow again at desired height or
make a narrower cutting swath (1/2
width).
3. Dull blade. 3. Sharpen or replace blade.
Uneven cut 1. Wheels not positioned 1. Placeallfourwheetsinsame height
correctly, position.
2. Dull blade. 2. Sharpen or replace blade.
1. Engage blade control handle.
2. Connect wire to spark plug.
3. Depress primer bulb slowly three
times.
4. Fill tank with clean, fresh gasoline.
5. Clean fuel line.
6. Clean, adjust gap or replace.
7. Wait for the engine to dry out.
1. Tighten spark plug wire.
2. Clean fuel line; fill tank with fresh
gasoline.
3. Clear vent.
4. Drain fuel tank. Refill with fresh fuel.
5. Clean air cleaner.
6. Adjust carburetor. Follow engine
manual.
Fill crankcase with proper oil.
Remove blower housing and clean.
Adjust carburetor.
Refer to separate engine manual packed with your mower for more engine related information.
NOTE: For repairs beyond the minor adjustments listed above, contact your nearest Cub Cadet dealer.
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