This is my first RV and I have an Onan 4.0 Genset. I've heard many people have experienced this same situation. I bought my RV used and the generator has only 400 hours on it. The generator ran perfect then all of a sudden one day it would stall after running for a few minutes. I've changed the air filter and cleaned out the fuel filter element. Same thing. Does anyone have any suggestions? I'm sure this has happened to some of you. Thanks!