Troubleshooting - Craftsman CX Series Operator's Manual

This section addresses minor service issues. To locate the nearest Sears Service Center or to schedule service, simply contact Sears at 1-800-4-MY-HOME®.
Problem
Engine Fails to start
Engine runs erratic
Engine overheats
Engine hesitates at high RPMs
Engine idles poorly
Excessive vibration
Unit fails to propel itself
Poor mowing performance

TROUBLESHOOTING

Disconnect the spark plug wire and ground it against the engine to prevent
unintended starting. Before performing any type of maintenance/service,
disengage all controls and stop the engine. Wait until all moving parts
have come to a complete stop. Always wear safety glasses during operation
or while performing any adjustments or repairs.
Cause
1. Choke not activated (Cold Engine)
2. Throttle/choke control not in correct position (Warm
Engine)
3. Spark plug wire disconnected
4. Faulty spark plug
5. Fuel tank empty or stale fuel
6. Reduced fuel flow/Blocked fuel filter.
7. Dead battery.
8. Blown fuse.
1. Unit running with choke applied
2. Spark plug wire loose
3. Reduced fuel flow/Blocked fuel filter.
4. Water or dirt in fuel system
5. Dirty air cleaner
1. Engine oil level low.
2. Air flow restricted.
1. Spark plug gap too close.
1. Spark plug fouled, faulty, or gap too wide.
2. Dirty air cleaner.
1. Cutting blade loose or unbalanced.
2. Bent cutting blade.
3. Loose hardware
1. Drive belt loose or damaged
1. Dull blade(s)
2. Broken, loose, or worn belt(s)
3. Blade(s) out of balance
WARNING
1. Place throttle/choke control lever into choke position.
2. Place throttle/choke lever into fast position.
3. Connect spark plug wire.
4. Clean, adjust gap, or replace.
5. Fill tank with clean, fresh gasoline.
6. Replace fuel filter as instructed in the Maintenance section.
7. Recharge battery.
8. Replace blown fuse.
1. Move throttle/choke lever out of choke position.
2. Connect and tighten spark plug wire.
3. Replace fuel filter as instructed in the Maintenance section.
4. Drain fuel. Refill with fresh fuel.
5. Replace air cleaner element and/or clean pre-cleaner.
1. Fill crankcase with proper oil.
2. Clean area around and on top of engine.
1. Remove spark plug and adjust gap.
1. Reset gap or replace spark plug.
2. Refer to Air Cleaner in Engine Maintenance section.
1. Tighten blade and spindle. Balance blade.
2. Replace blade.
3. Tighten all nuts and bolts.
1. Replace drive belt.
1. Sharpen or replace blade(s).
2. Replace belt(s).
3. Balance or replace blade(s).
27
Remedy