Generator only runs with engine on
Onan generator running without issue while to Ford E450 motor is running. Turn the motor off the generator stops running any where between 5-15 mins. The generator will not start off the house/coach...
Forum Discussion
You folks need to read the entire thread.
OP says the ONAN will run as long as the chassis engine is running (providing 12v power to the fuel pump).
OP says the ONAN will run 5 to 15 minutes AFTER the chassis engine is shut off. That means the fuel already pumped up to the ONAN is being used up, but no additional fuel is being pumped (fuel pump is not running).
The upstart of this is that the fuel pump gets 12v power when, and ONLY when, the chassis engine is running. ERGO, no power to it from the batteries. Either the batteries are dead, the disconnect switch has them disconnected, or there is a blown fuse or break in the circuit between the batteries and the fuel pump.
(The ONAN doesn't have an alternator or generator because it depends on the batteries for its 12v power, knowing that the converter/charger is keeping the batteries charged.)
OP says the ONAN will run as long as the chassis engine is running (providing 12v power to the fuel pump).
OP says the ONAN will run 5 to 15 minutes AFTER the chassis engine is shut off. That means the fuel already pumped up to the ONAN is being used up, but no additional fuel is being pumped (fuel pump is not running).
The upstart of this is that the fuel pump gets 12v power when, and ONLY when, the chassis engine is running. ERGO, no power to it from the batteries. Either the batteries are dead, the disconnect switch has them disconnected, or there is a blown fuse or break in the circuit between the batteries and the fuel pump.
(The ONAN doesn't have an alternator or generator because it depends on the batteries for its 12v power, knowing that the converter/charger is keeping the batteries charged.)
