Coil smoked on start up

SOURCE: Attempted to start Generac Guardian 15 kw air

I work on these every day. Its either gonna be the rotor or stater, the voltage regulator, but most likely its a bad stepper motor which is the throttle motor, or control board. Thats all that could be causing that so its one of those. If its the rotor or stater thats bad it causes the generator to RPM up because it thinks its not producing enough power due to that. I had the same problem with the same one we just fixed and it was the slip rings on the end of the rotor so bad rotor.

SOURCE: Generac Guardian 15 kw overspeed fault

Did you remember to set the overspeed shutdown threshold on the control board?

SOURCE: Just returned from a trip

Hi Scott,

Since the generator starts but there is no power to the control board, there is an electrical problem inside the generator.
First check the circuit breaker at the back of your generator. If the breaker is on, then your generator is in serious trouble.
Call a repairman, but also keep in mind you may need a new generator.

Hope this helps. If it does, I'd appreciate a 4 thumbs up. Thanks,

Handie Andie

SOURCE: I have a 16Kw generac generator. The unit starts then the engine overspeeds but does not shutdown. The engine starts to exhaust white smoke. I shut it down after only a matter of 2 or 3 seconds for fe

smell the oil to see if it smells like fuel f so the carb needle valve may not be seating

SOURCE: generac 20,000kW Standby generator doesn't start shows message STOP ALARM OVERCRANKED

Overcrank means that it tried to start and couldn't. It will go through 5 crank cycles and then stop with this alarm. Switch to off, hit enter to clear fault and then try to start in manual. Check to make sure you have fuel and pressure is 11 to 14 in WC.