Hi folks! I have a 2011 Thor Hurricane Class A gas Motorhome with an Onan 5500 generator and 2 A/C units. The generator cranks and runs fine with the a/c units going. Onan 4000 Generator will not start. Carburetor and wiring diagnostics and troubleshooting Onan Carburetors are to be replaced and not rebuilt. **Onan 4C is. As mentioned above, turn off all the circuit breakers. If need be, even the circuit breaker on the generator, if it still dies with the main breaker inside the coach off. Buy Cummins Onan RV QD 10000 Direct. Free Shipping. Tax-Free. Check the Cummins Onan RV QD10000 - 10kW RV Generator (Diesel) ratings before checking out. If you are thinking about buying an RV generator from us, you are most likely replacing an existing generator which was probably an Onan. Most customers coming to us. My Father In Law has constant problems with his Onan with less than 200 hours on it. About 90% of the time It will run for for a period of time between 5 and 20. This video is about Onan 5500 Oil Change. Onan 10 kW Standby Generator. When it comes to Onan Generator Troubleshooting, here are some essential tips to follow. A generator of any type powered by any fuel and. My onan generator is not running.The blinking light on the generator blinks 3 times after trying to start.I had someone look at it before.They found that it was low. Author Topic: Onan Generator 4000w Cuts off after running a while (Read 25663 times).