Tag Archives: onan

Onan Generator Troubleshooting and Repair

The RV is still in the shop (long story) and the trailer is still being built, so I’m sort of in between projects. I worked on this Onan Marquis 7000 generator for a little extra money and thought it might be interesting to some of you.

Note: This is NOT the generator from our RV. This is from a stage trailer that my church bought.

When I got the generator it wasn’t running. Once I got it running it wouldn’t produce any power. It turned out the carbs were all gunked up, the voltage regulator was bad, and the brushes needed cleaning.

$1100 Dollars in Fluids/Filters! (Buying an RV Without Service History)

Before we take our ’99 Monaco Dynasty on the road, I decided to perform a full maintenance service. I quickly learned there was more involved than I first thought. Over $1000 dollars in fluids/ filters and 2 weeks of research led me to this…

By the end of the weekend I changed the oil, air, and fuel filter in our Onan 7500 generator. Changed the fluid and filters in the hydraulic system, and replaced the fuel filters and diesel engine oil.