Several years ago I bought my Toy Hauler with a non working Onan generator. I knew nothing about generators but had done some repairs on small lawnmower type engines. I called the Onan repair facility and they wanted some crazy amount I think $500 minimum. I watched a lot of videos and did a lot of online reading and was able to fix it myself. I did buy my parts from Onan the people in the parts department were very helpful. After all that I added a fuel shut off and inline fuel filter(gas not propane) I also made sure I ran it every once in a while after to keep it running.