Originally Posted by YC1
I would not hesitate to change the fuel filter and while doing that be sure the hoses are not kinked.
Fuel filters seem to clog up far too quickly on these. The thing may be eventually starving for fuel. I suspect the fuel pumps heat up and fail prematurely due to lack of cooling fuel passing through. Excess fuel is routed back to the tank so a plugged filter would restrict that cooling effect.
If the generator starts up quickly after a shutdown it may be due to the primer pushing plenty of fuel into the system
Turns out your diagnosis was dead on. Even though it was acting Identical to Tom and Paula's 2011 Camelot's 12.5kw. It would shut down after awhile if it had to much load on it.
Tom finally got the mobile Onan Tech out to his who then changed out his circuit board after temporarily installing a different circuit board and it ran as should.
We tried the board on my coach and it was worse than with my circuit board. Although the symptains still seemed to be electrical. So after the tech checked some more electrical connections with no improvement cause it would now only run for a few minutes with about 50% load on it.
The Tech then wanted to test the fuel flow from the pump. The flow was weak and ironically the pump failed while we we're testing it.
After installing a new pump and fuel filter we we're able to run it for over an hour at 85-90% load without a hiccup or burp.
Hopefully this is the end of my problems. Just can't believe I've gone through 2 fuel pumps in 530 hours of use.
Guess I'll have to start carrying a spare fuel pump as well as a fuel filter