[Don Higgins]

I have been battling a 10 K Onan generator that will run all day at times then slowly shut down every 30 minutes at night. The code it generates is 36.

I put a new fuel filter, air filter, checked all tubing for plastic bags and changed the oil and filter. The engine is the Isuzu. The only thing I can say that may help is the fuel pump return line stops pulsing when the engine was about to die. When I pushed the return line over to the side to restrict it the engine sprang back to life.

I think the fuel pump isn't pumping or the board isn't telling the pump to continue pumping. I will replace the pump this week but do you have any other ideas? Slate Cummings was having the exact same problem this week but he replaced the pump and it still slowly dies every 30 minutes.