Onan QD 10K Won't Run

[Jerry Emert]

The adventure continues.  Today getting ready to move to Grand Junction I tried to start the genny.  It will start and run for 1-5 seconds and then it quits.  Fuel over 3/4s, oil half way up the stick and coolant at the min level.  At the genny switch I got a code of "45."  a few minutes later I tried from the cab again and got a code of 33333 until it stopped assuming thats a "33."  Any ideas that an amateur DYIer can handle?
Thanks as always.
Jerry

[Dick Simonis]

Jerry, mine did the same thing and it was an overheat issue.  Turns out the fan belt was loose and slipping.  The other possibility is the temp sensor that also has a rep for failing but the fix is still the same.  Gen set must come out.

Hopefully your issue is something more simple.

[Edward Buker]

Jerry,
You can call an Onan service center and discuss those codes. They will have a good idea what is happening. I have had an overheat code like Dick mentioned but it takes 5 minutes or more for a cold engine to overheat from a slipping belt. Once heated then just 30 seconds or so after a start. My expectation is that it is the electrical side monitoring not being right given the fail is in a few seconds.

Later Ed

[Jerry Emert]

Thanks Ed, from my research also it looks like a control issue is not providing the continuing "run" 12V signal.  Might be simple but good chance it's the control board.  Stuff happens and why I bought the Extended warranty (insurance).  I'll update when I know.
Jerry

[Jerry Emert]

!700 dollars removing the generator and finding a "pushed pin" in one of the power plugs.  Most of that removing the generator to get to the wiring.  I had the 1500 hour service done 460 hours early to avoid removing it again if I can help it.  That includes the service.

[Tom and Pam Brown]

You may want to check to see if any of the spade connectors inside the access door has worked loose.  They had issues with these type connectors.  I had to reconnect several over the years.

[Jerry Emert]

I had the 1500 hour service done since they had to take the gen. out of the coach anyway.  I hope there is nothing loose now after 1700 dollars!  But you know how it goes.