Cummings/Onan recommends that you run the generator 2 hours a month to keep it exercised. When we did the walkthrough the tech told us to make sure we ran it at least an hour a month. This makes sure that everything remains lubricated, seals wet and keeps fresh fuel in the system to avoid any varnishing in the carb. Same as a lawn mower. Will last much longer is it is regularly run. I was always told that mechanical things need to run or otherwise they just rot.
2017 Winnebago Fuse 23a
The conFUSEd RVer