RV Generator Repair and Service in Placentia, California

Gasoline Onan units are especially sensitive to sitting. Ethanol blended fuel degrades within months, leaves varnish in the carburetor jets and gums the float, and a coach that sat through a season in a Placentia driveway will frequently need the carburetor cleaned or replaced before anything else.

Diesel gensets fail differently, usually at the lift pump, the fuel filter or through air in the fuel system. They also object to the same low load running that owners think is gentle, since a diesel that never sees real load wet stacks and glazes its cylinders.

We test at stepped load and watch voltage, frequency and how quickly the governor recovers between steps. A slow recovery or a frequency that will not hold points at the governor, the fuel delivery or a partially clogged exhaust rather than at the alternator end.

Load testing also catches windings and brush problems that show as voltage that starts correct and then decays under sustained load. That distinction matters because it separates a fuel system repair costing a few hundred dollars from an end replacement costing several thousand.

Exercising under load is the single most effective habit. It circulates fuel, keeps the carburetor wet, charges the start battery and loads the windings, which prevents most of the no start calls we see from coaches that sat idle through the off season.

Air filters and cooling matter more than owners expect in this climate. A genset drawing summer air through a restricted filter or a debris packed cooling path runs hot, and sustained heat is what turns a routine service into a rebuild.