Re: FUEL FILTER 330 CUMMINGS BEAVER SANTIAM
Hello Steven and welcome to RVUSA.
How long have you owned this home. No manuals?
Hmmm. You should have a fuel filter at the engine. Look for your fuel lines and trace it to the filter. If you have a second fuel filter it would be a fuel/water separator. That would be behind a small door located at the rear and outside of the home. I think I have seen some mounted back in the radiator compartment.