Generator Service & Repair

Generator problems generally fall into one of a few buckets: it will not start, it starts but will not carry a load, or it runs rough and shuts down under demand. Onan generators, common on both gas and diesel coaches, frequently develop carburetor varnish or gum buildup from ethanol fuel sitting unused between trips, which causes hard starting or stalling. We clean or rebuild carburetors, check fuel pumps and solenoids, and verify spark and compression before assuming a bigger failure.

A generator that starts fine but trips or bogs under load is a different problem, usually pointing to a failing stator, worn brushes, a bad voltage regulator, or a transfer switch issue rather than the engine itself. We load test generators under realistic conditions, running AC and other high-draw appliances, rather than just confirming it starts and idles, since a generator can look fine at idle and still fail the moment real demand hits it.

We also handle routine generator maintenance: oil and filter changes, air filter service, and exercising schedules, since generators that sit unused for long stretches, common with seasonal RV use, are the ones most likely to develop fuel and starting issues.