Cub Cadet CC 800 Operation Manual - Page 26

Troubleshooting

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Troubleshooting 8 Problem Engine fails to start Cause 1. Choke not activated. 2. Fuel tank empty, or stale fuel. 3. Blocked fuel line. 4. Faulty spark plug. 5. Engine flooded. 6. Dead battery (electric start models only). Engine runs erratically 7. Blown fuse (electric start models only). 1. Engine running with CHOKE activated. 2. Spark plug wire(s) loose. 3. Blocked fuel line or stale fuel. 4. Vent in gas cap plugged. 5. Water or dirt in fuel system. Engine overheats 6. Dirty air cleaner. 1. Engine oil level low. 2. Air flow restricted. Engine hesitates at high RPM Engine idles poorly 1. Spark plug gap too close. 1. Spark plug fouled, faulty or gap too wide. 2. Dirty air cleaner. Excessive vibration Mower will not mulch grass 1. Cutting blade loose or unbalanced. 2. Damaged or bent cutting blade. 1. Engine speed too low. 2. Wet grass. 3. Excessively high grass. Uneven cut 4. Dull blade. 1. Dull blade. 2. Uneven tire pressure. 3. Blade(s) out of balance. Remedy 1. Place throttle/choke control in CHOKE position. 2. Fill tank with clean, fresh (less than 30 days old) gas. 3. Clean fuel line and replace fuel filter. Refer to Engine Operator's Manual. 4. Clean, adjust gap or replace plug. Refer to Engine Operator's Manual. 5. Crank engine with throttle in FAST position. 6. Recharge battery. Refer to page 24 in the Service section. 7. Replace blown fuse. Refer to page 25 in the Service section. 1. Move throttle/choke control out of CHOKE position. 2. Connect spark plug wire(s). 3. Clean fuel line; fill tank with clean, fresh gasoline and replace fuel filter. 4. Clear vent or replace cap if damaged. 5. Drain fuel tank. Refill with clean, fresh gasoline. 6. Replace air cleaner paper element. Refer to Engine Operator's Manual. 1. Fill crankcase with proper amount and weight of oil. 2. Clean grass clippings and debris from around the engine's cooling fins and blower housing. 1. Remove spark plug and reset the gap. Refer to Engine Operator's Manual. 1. Replace spark plug. Set plug gap. 2. Replace air cleaner element and/or clean precleaner. Refer to Engine Operator's Manual. 1. Tighten blade and spindle. 2. Replace blade. 1. Place throttle in FAST (rabbit) position. 2. Do not mulch when grass is wet. 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. Sharpen or replace blade. 2. Check tire pressure in rear tires. 3. Balance or replace blade(s). 26

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Troubleshooting
8
26
Problem
Cause
Remedy
Engine fails to start
1. Choke not activated.
2.
Fuel tank empty, or stale fuel.
3. Blocked fuel line.
4. Faulty spark plug.
5. Engine flooded.
6.
Dead battery (electric start models only).
7.
Blown fuse (electric start models only).
1.
Place throttle/choke control in CHOKE
position.
2.
Fill tank with clean, fresh (less than 30 days
old) gas.
3.
Clean fuel line and replace fuel filter. Refer to
Engine Operator’s Manual.
4.
Clean, adjust gap or replace plug. Refer to
Engine Operator’s Manual.
5.
Crank engine with throttle in FAST position.
6.
Recharge battery. Refer to page 24 in the
Service section.
7.
Replace blown fuse. Refer to page 25 in
the Service section.
Engine runs erratically
1.
Engine running with CHOKE activated.
2. Spark plug wire(s) 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.
Move throttle/choke control out of CHOKE
position.
2. Connect spark plug wire(s).
3.
Clean fuel line; fill tank with clean, fresh
gasoline and replace fuel filter.
4.
Clear vent or replace cap if damaged.
5.
Drain fuel tank. Refill with clean, fresh
gasoline.
6.
Replace air cleaner paper element. Refer to
Engine Operator’s Manual.
Engine overheats
1. Engine oil level low.
2. Air flow restricted.
1.
Fill crankcase with proper amount and
weight of oil.
2.
Clean grass clippings and debris from around
the engine’s cooling fins and blower housing.
Engine hesitates at high
RPM
1.
Spark plug gap too close.
1.
Remove spark plug and reset the gap. Refer
to Engine Operator’s Manual.
Engine idles poorly
1.
Spark plug fouled, faulty or gap too wide.
2. Dirty air cleaner.
1.
Replace spark plug. Set plug gap.
2.
Replace air cleaner element and/or clean pre-
cleaner. Refer to Engine Operator’s Manual.
Excessive vibration
1.
Cutting blade loose or unbalanced.
2. Damaged or bent cutting blade.
1. Tighten blade and spindle.
2. Replace blade.
Mower will not mulch grass
1. Engine speed too low.
2. Wet grass.
3. Excessively high grass.
4. Dull blade.
1.
Place throttle in FAST (rabbit) position.
2.
Do not mulch when grass is wet.
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.
Uneven cut
1. Dull blade.
2. Uneven tire pressure.
3. Blade(s) out of balance.
1. Sharpen or replace blade.
2.
Check tire pressure in rear tires.
3. Balance or replace blade(s).