Cub Cadet CC 760ES CC 760ES Operator's Manual - Page 27

Troubleshooting - problems

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Troubleshooting 8 Problem Engine fails to start Cause 1. Choke not activated. 2. Fuel tank empty, or stale fuel. Engine runs erratically 3. Blocked fuel line. 4. Faulty spark plug. 5. Engine flooded. 6. Dead battery (electric start models only). 7. Blown fuse. 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. Deck not leveled properly. 2. Dull blade. 3. Uneven tire pressure. 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. 4. Clean, adjust gap or replace plug. 5. Crank engine with throttle in FAST position. 6. Recharge battery. 7. Replace blown fuse. 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. 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. 1. Replace spark plug. Set plug gap. 2. Replace air cleaner element and/or clean pre-cleaner. 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. Perform side-to-side deck adjustment. 2. Sharpen or replace blade. 3. Check tire pressure in rear tires. 27

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Problem
Cause
Remedy
Engine fails to start
Choke not activated.
1.
Fuel tank empty, or stale fuel.
2.
Blocked fuel line.
3.
Faulty spark plug.
4.
Engine flooded.
5.
Dead battery (electric start models only).
6.
Blown fuse.
7.
Place throttle/choke control in CHOKE
1.
position.
Fill tank with clean, fresh (less than 30 days
2.
old) gas.
Clean fuel line and replace fuel filter.
3.
Clean, adjust gap or replace plug.
4.
Crank engine with throttle in FAST position.
5.
Recharge battery.
6.
Replace blown fuse.
7.
Engine runs erratically
Engine running with CHOKE activated.
1.
Spark plug wire(s) 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.
Move throttle/choke control out of CHOKE
1.
position.
Connect spark plug wire(s).
2.
Clean fuel line; fill tank with clean, fresh
3.
gasoline and replace fuel filter.
Clear vent or replace cap if damaged.
4.
Drain fuel tank. Refill with clean, fresh
5.
gasoline.
Replace air cleaner paper element.
6.
Engine overheats
Engine oil level low.
1.
Air flow restricted.
2.
Fill crankcase with proper amount and
1.
weight of oil.
Clean grass clippings and debris from around
2.
the engine’s cooling fins and blower housing.
Engine hesitates at high
RPM
Spark plug gap too close.
1.
Remove spark plug and reset the gap.
1.
Engine Idles poorly
Spark plug fouled, faulty or gap too wide.
1.
Dirty air cleaner.
2.
Replace spark plug. Set plug gap.
1.
Replace air cleaner element and/or clean
2.
pre-cleaner.
Excessive vibration
Cutting blade loose or unbalanced.
1.
Damaged or bent cutting blade.
2.
Tighten blade and spindle.
1.
Replace blade.
2.
Mower will not mulch grass
Engine speed too low.
1.
Wet grass.
2.
Excessively high grass.
3.
Dull blade.
4.
Place throttle in FAST (rabbit) position.
1.
Do not mulch when grass is wet.
2.
Mow once at a high cutting height, then
3.
mow again at desired height or make a
narrower cutting swath.
Sharpen or replace blade.
4.
Uneven cut
Deck not leveled properly.
1.
Dull blade.
2.
Uneven tire pressure.
3.
Perform side-to-side deck adjustment.
1.
Sharpen or replace blade.
2.
Check tire pressure in rear tires.
3.
Troubleshooting
8
27