I have an Onan 4000 microquiet generator in my 2008 JAYCO Melbourne 29D. For many years, I had no problem with it at all, but recently it has developed one. It starts and runs fine - as it should- if the temperature outdoors is below 72-75 degrees. Above that, it will start, run for a short time and quit. It will not restart until it cools down, and if the temp stays above 75, it won't run at all. It is apparent that this is a heat related problem, but how to solve it is a mystery. Anyone have the same problem? Any suggestions for fixing it???