Onan Generator Trouble - Won't Run With Load
We're getting ready for a 6 week trip and found our Onan 5500 generator won't run with a load. We have replaced the carburetor (service code 14) thinking that there might be a speck of dirt causing t...
Forum Discussion
Sounds like it could be a fuel supply issue. Does it surge a little when you switch on a load? It should, and then recover. If not, then your governor may not be working adequately enough to compensate for the load and the engine shuts down from not getting enough fuel to keep running under load. It could also be the fuel pump...nothing says a new fuel pump can't go bad or a new fuel filter can't get stopped up. Gasoline these days is horrible.
I assume that the oil level is adequate? If not, then then the low oil pressure could be cutting it off.
Also, some gensets will shut down if they are not producing power. You may want to clean your brushes and the slip ring to make sure there's good contact between the two. You can use a can of contact cleaner or brake cleaner and while the genset is running, spray it on the slip ring. There should be enough friction between the brushes and the slip ring to clean off any built-up carbon or other contaminants. Of course, depending on usage, the brushes may be worn to a point that they are losing contact too.
Just a few more suggestions.
I assume that the oil level is adequate? If not, then then the low oil pressure could be cutting it off.
Also, some gensets will shut down if they are not producing power. You may want to clean your brushes and the slip ring to make sure there's good contact between the two. You can use a can of contact cleaner or brake cleaner and while the genset is running, spray it on the slip ring. There should be enough friction between the brushes and the slip ring to clean off any built-up carbon or other contaminants. Of course, depending on usage, the brushes may be worn to a point that they are losing contact too.
Just a few more suggestions.
