Hi, the Onan 4000 in my Winnebago is 12 years old and has never given much difficulty even though I don't use it much, though I do a "maintenance run as often as I remamber. I do routine service fairly regularly, oil, filter etc. But for the first time it gave trouble this weekend, on a hot day running the AC full blast. The rpms dropped, it overheated, and the engine went pop-pop-pop, and a check of the trouble codes pulled up #37--voltage/rpm mismatch. It recovered and runs ok for the moment.
Here in New Brunswick we have ethanol in the two lower grades of gas, but I'm not about to put hi-test gas in the V-10. So I'm thinking I'll buy some fuel hose and some carb cleaner and run some hi-test through it from a container and see how that works.
The question is, considering that I have also had trouble with my 2001 Cherokee 4litre since the useless ethanol arrived in NB, should I just think of putting in a separate tank for the genny, and run hi-test in it all the time?