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PROBLEM CAUSE CORRECTION
Engine is running, but no 1. One of the circuit breakers is open. 1. Reset circuit breaker.
AC output is available. 2. Fault in generator. 2. Contact Generac Service Facility.
3. Poor connection or defective 3. Check and repair.
cord set.
4. Connected device is bad. 4. Connect another device that
is in good condition.
Engine runs good at no-load but bogs 1. Short circuit in a connected load. 1. Disconnect shorted electrical
down" when loads are connected load.
2. Engine speed is too slow. 2. Contact Generac Service Facility.
3. Generator is overloaded. 3. See Don't Overload the
Generator
4. Shorted generator circuit. 4. Contact Generac Service Facility.
Engine will not start; or starts 1. On/Off set to OFF. 1. Set switch to ON.
and runs rough. 2. Dirty air cleaner 2. Clean or replace air cleaner.
3. Out of gasoline. 3. Fill fuel tank.
4. Stale gasoline. 4. Drain gas tank; fill with fresh fuel.
5. Spark plug wire not connected 5. Connect wire to spark plug.
to spark plug.
6. Bad spark plug. 6. Replace spark plug.
7. Water in gasoline. 7. Drain gas tank; fill with fresh fuel.
8. Overchoking. 8. Open choke fully and crank engine.
9. Excessively rich fuel mixture. 9. Contact Generac Service Facility.
10. Intake valve stuck open or closed. 10. Contact Generac Service Facility.
11. Engine has lost compression. 11. Contact Generac Service Facility.
12. Intake valve stuck open or closed. 12. Contact Generac Service Facility.
13. Engine compression lost. 13. Contact Generac Service Facility.
14. Failed battery. 14. Replace battery.
Engine shuts down during operation 1. Out of gasoline. 1. Fill fuel tank.
2. Low oil level. 2. Fill crankcase to proper level.
Engine lacks power. 1. Load is too high. 1. See Don't Overload the Generator
2. Dirty air filter. 2. Replace air filter.
Engine hunts or falters. 1. Choke is opened too soon. 1. Move choke to halfway position until
engine runs smoothly.
2. Carburetor is running too rich 2. Contact Generac Service Facility.
or too lean.
TROUBLESHOOTING POINTS
GENERAC
Generac Mega 2500 Extended Life Generator
11
Extended Life Generator