Cub Cadet 109 ユーザーズマニュアル

Engine fails to start

1.  Blade control disengaged.
2.  Spark plug wire disconnected.
3.  Fuel tank empty or stale fuel.
4.  Engine not choked.

5.  Faulty spark plug.
6.  Blocked fuel line.
7.  Engine flooded.

1.  Engage blade control.
2.  Connect wire to spark plug.
3.  Fill tank with clean, fresh gasoline.
4.  Choke engine as instructed in the 

“Operating Your Lawn Mower” section.

5.  Clean, adjust gap, or replace.
6.  Clean fuel line.
7.  Wait a few minutes to restart, but do 

not prime.

Engine runs erratic

1.  Connect and tighten spark plug wire.
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 manual.
6.  Refer to engine manual.

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.  Fill crankcase with proper oil.
2.  Remove blower housing and clean.
3.  Refer to engine manual.

1.  Engine oil level low.
2.  Air flow restricted.
3.  Carburetor not adjusted properly.

Occasional skips 
(hesitates) at high speed

1.  Adjust gap to .030-inch.
2.  Refer to engine manual.

1.  Spark plug gap too close.
2.  Carburetor idle mixture adjustment 

improperly set.

Idles poorly

1.  Reset gap to .030-inch or replace 

spark plug.

2.  Refer to engine manual.
3.  Refer to engine manual.

1.  Spark plug fouled, faulty or gap too wide.

2.  Carburetor improperly adjusted.
3.  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.  Place all four wheels in same  

height position.

2.  Sharpen or replace blade.

1.  Wheels not positioned correctly.

2.  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.