Onan 5500 Backfires and Dies under a load
Good Morning.. Im hoping to find the Onan guru's that are here... For the past year I have been searching for answers and replacing parts with no improvement. I have an Onan 5500 with less than 100...
Forum Discussion
Chris Bryant wrote:
If it started suddenly, I would bet on a broken valve component- spring or rocker arm.
Yes, I've seen that (and/or a tight valve clearance) on 5.5, but IMO, it would happen all the time, even when cold. How does that explain this: "It began backfiring and then dying when a load was placed on it. . . . . . until it dies then gives an overheated exhaust code."
I'm assuming that later after cooling off, it runs (semi) normally when warming up and NOT under load. A compression check and a look at the valve train/clearance is in order. Interesting issue. This is a NEW generator!
Chum lee
