A-iPower SUA9000E, Owner'S Manual

Problem

Possible Causes

Probable Solutions

Engine misfires

1. Spark plug cap loose.

2. Incorrect spark plug gap or 

damaged spark plug.

3. Defective spark plug cap.

4. Old or low quality gasoline.

5. Incorrect compression.

1. Check wire connections.

2. Re-gap or replace spark plug.

3. Replace spark plug cap.

4. Use only fresh 87+ octane stabilizer-treated 

unleaded gasoline.
Do not use gasoline with more than 
10% ethanol (E15, E20, E85, etc.).

5. Diagnose and repair compression. 

(Use Engine will not start: 
COMPRESSION RELATED section.)

Engine stops 
suddenly

1. Fuel tank empty or full of impure or low quality 

gasoline.

2. Low oil shutdown.

3. Defective fuel tank cap creating vacuum, 

preventing proper fuel flow.

4. Faulty magneto.

5. Disconnected or improperly 

connected spark plug cap.

1. Fill fuel tank with fresh 87+ octane stabilizer-

treated unleaded gasoline.
Do not use gasoline with more than 
10% ethanol (E15, E20, E85, etc.).

2. Fill engine oil to proper level.  

Check engine oil before EVERY use.

3. Test/replace fuel tank cap.

4. Have qualified technician service magneto.

5. Secure spark plug cap.

Engine stops when 
under heavy load

1. Dirty air filter

2. Engine running cold.

1. Clean or replace element.

2. Allow engine to warm up prior 

to operating equipment.

Engine knocks

1. Old or low quality gasoline.

2. Engine overloaded.

3. Incorrect spark timing, deposit buildup, 

worn engine, or other mechanical problems.

1. Fill fuel tank with fresh 87+ octane stabilizer-

treated unleaded gasoline. 
Do not use gasoline with more than 
10% ethanol (E15, E20, E85, etc.).

2. Do not exceed equipment’s load rating.

3. Have qualified technician diagnose and service

Engine backfires

1. Impure or low quality gasoline.

2. Engine too cold.

3. Intake valve stuck or overheated engine.

4. Incorrect timing.

1. Fill fuel tank with fresh 87+ octane stabilizer-

treated unleaded gasoline. 
Do not use gasoline with more than 
10% ethanol (E15, E20, E85, etc.).

2. Use cold weather fuel and oil additives 

to prevent backfiring.

3. Have qualified technician diagnose 

and service engine.

4. Check engine timing.

Generator shuts down 
during operation

No AC output

Generator gallops

Repeated circuit 
breaker tripping

Generator cannot 
supply enough power 
or overheating

1.  Out of fuel.
2.  Low oil level.

1.  Generator is overloaded.

2.  Insufficient ventilation.

1.  Cable not properly connected.
2.  Circuit breaker is open.
3.  Faulty brush assembly.
4.  Faulty AVR.
5.  Loose wiring.
6.  Other.

1.  Engine governor defective.

1. Overload.

2. Faulty cords or device.

1.  Fill fuel tank.
2.  Fill crankcase to the proper level. Place 
     generator on a flat, level surface.

1.  Review load and adjust, see“xx”.

2.  Check for air restriction. Move to a well 
     ventilated area.

1.  Check all connections.
2.  Reset circuit breaker.
3.  Replace brush assembly.
4.  Replace AVR.
5.  Inspect and tighten wiring connections.
6.  Contact Customer Service at 1-855-888-3598.

1.  Contact Customer Service at 1-855-888-3598.

1.  Review load and adjust. See“Wattage Reference
Guide” on Page 10.
2.  Check for damaged, bare or frayed wires. 
     Replace defective device.

engine.

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