Chicago Electric 66523 Set Up, Operating, And Servicing Instructions page 17

Problem
Engine misfires
Engine stops
suddenly
Engine knocks
Engine backfires
Follow all safety precautions whenever diagnosing or servicing the
equipment or engine.
SKU 66523 For technical questions, please call 1-800-444-3353.
TROuBLESHOOTING - ENGINE
Possible Causes
1. Spark plug wire loose.
2. Incorrect spark plug gap or
damaged spark plug.
3. Defective spark plug wire.
4. Old or low quality gasoline.
5. Incorrect compression.
1. Low oil shutdown.
2. Fuel tank empty or full of impure or
low quality gasoline.
3. Defective fuel tank cap creating
vacuum, preventing proper fuel
flow.
4. Improper idle speed.
5. Faulty magneto, incorrect timing, or
clogged carburetor.
1. Old or low quality gasoline.
2. Engine overloaded.
3. Incorrect spark timing, deposit
buildup, worn engine, or other
mechanical problems.
1. Impure or low quality gasoline.
2. Engine too cold.
3. Choke not open after engine warm.
4. Engine not properly adjusted for
high altitude operation.
5. Intake valve stuck, choke stuck,
incorrect timing, clogged carburetor,
or overheated engine.
Probable Solutions
1. Check wire connections.
2. Re-gap or replace spark plug.
3. Replace spark plug wire.
4. Use only fresh 91+ octane
unleaded gasoline.
5. Diagnose and repair compression.
(Use Engine will not start:
COMPRESSION RELATEd
section.)
1. Fill engine oil to proper level.
Check engine oil before EVERY
use.
2. Fill fuel tank with fresh 91+ octane
unleaded gasoline.
3. Test/replace fuel tank cap.
4. Properly adjust idle speed.
5. Have qualified technician diagnose
and service engine.
1. Fill fuel tank with fresh 91+ octane
unleaded gasoline.
2. Do not exceed equipment's load
rating.
3. Have qualified technician diagnose
and service engine.
1. Fill fuel tank with fresh 91+ octane
unleaded gasoline.
2. Use cold weather fuel and oil
additives to prevent backfiring.
3. Move choke to run position after
engine warms up.
4. Qualified technician must adjust
engine at altitudes greater than
5,000 feet above sea level.
5. Have qualified technician diagnose
and service engine.
Page 17