I own an '08/09 RT170 with Onan 2800 Microlite and had my first repeating stall episode while doing my monthly exercise routine. I *think* it may have been due to a gas tank pressure vacuum, as I had just topped the tank off.
While I was doing the monthly exercise using the Cool Cat AC, my the genset would cut out after 5-10 mins. The engine initially runs smoothly but after few minutes it would start hunting and then quit, sounding much lIke my lawn mower does when I turn the fuel line off. The motor would have a hard time restarting immediately from stall, but wait a few minutes and it was easy to restart. This cycle repeated 6-8x, before I gave up for the day.
The next day, I thought about the potential vacuum issue and opened the RT's gas cap to test it. Genset ran perfectly for the 2hr exercise. Interestingly, I closed the cap at the end of the exercise to see if I could get it stall, but it did not - although to be fair, I didn't wait very long (8-10mins?). Perhaps the gallon of so fuel usage was enough to break the vacuum issue?
Just wondering if anyone else has run into this behavior, or is this a symptom of my Onan fuel pump going bad?
