DrewE wrote:
Maybe you should just do an experiment to find out how your motorhome is connected up? Easiest would probably be to drive around until one of the two tanks is practically empty (or actually empty, for that matter), and then see if the generator runs and keeps running. if so, it's getting fuel from the other tank.
Uh...No, don't do that, especially if it is diesel.
If you suck a diesel dry you then have to prime it. Not all diesels are self priming. Fine if you know how to do it. Expensive if you have to pay somebody who does.
Safe to assume that RVs are the same as boats with gennys i.e. the intake for the genny is higher in the tank than the suction for the propulsion engine. There is a reason for that.