Hi, I recently bought a "98 Minnie Winnie 31 WM with very low miles and in incredibly good condition. It has a couple of problems though and I thought I would ask about one of them now. The Onan 4000 micro lite generator (250 hrs on the meter) starts very difficultly. According to the old owner, it has always been that way. It starts, but it takes a special drill. You run the starter (either local or remote) for 5 seconds or so and let off. Eventually it fires and runs for a second or two or three or four, then dies. I have found it works better if you wait quite a while (15 seconds or so) between tries. It may take a dozen or more attempts before it takes off and catches, then runs absolutely fine from there on out until I shut it off. If I restart it right away, it starts fine. If it sets for any amount of time off (maybe 15-20 minutes), you have to go through this ritual again. The previous owner acted if it were normal. I don't buy that. The motor home is always kept full of fuel, The gen set has plenty of fresh oil, and my all my batteries are good.
I changed the spark plug and fixed the broken air filter mount (God only knows how long that has been broken). Put a new air filter on too. None of this made any difference. I have visually checked the fuel line (it looks OK), and I can't find a fuel filter (if it even has one.) I cant find the fuel pump (if it has one) either
After reading tons of threads I am coming to believe that it is either a bad fuel supply or a bad voltage regulator. I don't know which and don't know how to check either in more detail. With what I have described, can someone rule one or the other (or both) out , then point me in the right direction?