Problem Cause Correction
Engine is running, but no
AC output is available.
1. One of the circuit breakers is open.
2. Fault in generator.
3. Poor connection or defective cord
set.
4. Connected device is bad.
1. Reset circuit breaker.
2. Contact Generac service facility.
3. Check and repair.
4. Connect another device that is in
good condition.
Engine runs good at no-
load but bogs down
when loads are
connected.
1. Short circuit in a connected load.
2. Engine speed is too slow.
3. Generator is overloaded.
4. Shorted generator circuit.
1. Disconnect shorted electrical load.
2. Contact Generac service facility.
3. See Dont Overload the Generator
on page 12.
4. Contact Generac service facility.
Engine will not start; or
starts and runs rough.
1. Run/Stop switch set to Stop.
2. Dirty air cleaner.
3. Out of gasoline.
4. Stale gasoline.
5. Spark plug wire not connected to
spark plug.
6. Bad spark plug.
7. Water in gasoline.
8. Overchoking.
9. Excessively rich fuel mixture.
10. Intake valve stuck open or closed.
11. Engine has lost compression.
1. Set switch to Run.
2. Clean or replace air cleaner.
3. Fill fuel tank.
4. Drain gas tank; fill with fresh fuel.
5. Connect wire to spark plug.
6. Replace spark plug.
7. Drain gas tank; fill with fresh fuel.
8. Open choke fully and crank engine.
9. Contact Generac service facility.
10. Contact Generac service facility.
11. Contact Generac service facility.
Engine shuts down
during operation.
1. Out of gasoline.
2. Low oil level.
1. Fill fuel tank.
2. Fill crankcase to proper level.
Engine lacks power.
1. Load is too high.
2. Dirty air filter.
1. See Dont Overload the Generator
on page 12.
2. Replace air filter.
Engine hunts or falters.
1. Choke is opened too soon.
2. Carburetor is running too rich or
too lean.
1. Move choke to halfway position until
engine runs smoothly.
2. Contact Generac service facility.
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