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
Look underneath the muffler
Probably a square 1/4" pipe plug
Remove it and run the gen
Could be a lean condition if the plug porcelain was white but you just changed plugs.
The tip was black so maybe it's more ignition related, wire, coil, circuit board etc.
Check your altitude adjustment
The fact you replaced carb and pump and filters points more to ignition or lack of.
Probably a square 1/4" pipe plug
Remove it and run the gen
Could be a lean condition if the plug porcelain was white but you just changed plugs.
The tip was black so maybe it's more ignition related, wire, coil, circuit board etc.
Check your altitude adjustment
The fact you replaced carb and pump and filters points more to ignition or lack of.
