Cub Cadet 18M - Manual (Page 12)

1
For repairs beyond
the minor adjust-
ments listed here,
contact an authorized
service dealer.
6
Trouble
Shooting
Cause Problem Remedy
Engine fails to start 1. Blade control disengaged.
2. Spark plug boot disconnected.
3. Fuel tank empty or stale fuel.
4. CHOKE not activated.
5. Faulty spark plug.
6. Blocked fuel line.
7. Engine flooded.
1. Engage blade control.
2. Connect boot to spark plug.
3. Fill tank with clean, fresh gasoline.
4. Choke engine as instructed in
“Operating Your Lawn Mower”.
5. Clean, adjust gap, or replace.
6. Clean fuel line.
7. Wait a few minutes to restart.
Engine runs erratic 1. Connect and tighten spark plug
boot.
2. Clean fuel line; fill tank with clean,
fresh gasoline.
3. Clear vent.
4. Drain fuel tank. Refill with
fresh fuel.
5. Refer to engine maintenance
section.
6. Push CHOKE knob in.
1. Spark plug boot 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. Unit running with CHOKE applied.
Engine overheats
1. Fill crankcase with proper oil.
2. Remove blower housing
and clean.
1. Engine oil level low.
2. Air flow restricted.
Occasional skips
(hesitates) at
high speed
1. Adjust gap to .030”. 1. Spark plug gap too close.
Idles poorly 1. Reset gap to .030” or replace
spark plug.
2. Refer to engine maintenance
section.
1. Spark plug fouled, faulty or gap
too wide.
2. Dirty air cleaner.
Mower will not
mulch grass
1. Do not mow when grass is wet;
wait until later to cut.
2. Mow once at a high cutting height,
then mow again at desired height
or make a narrower cutting path.
3. Sharpen or replace blade.
1. Wet grass.
2. Excessively high grass.
3. Dull blade.
Uneven cut 1. Sharpen or replace blade. 1. Dull blade.
Excessive
Vibration
1. Cutting blade loose or unbalanced.
2. Bent cutting blade.
1. Tighten blade and adapter.
Balance blade.
2. See an authorized service dealer.