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shaneperch's avatar
shaneperch
Explorer
Feb 17, 2015

fuel tanks aux or main

I can't seem to get a decent answer on this in class "A" So maybe someone here will help me Okay I have a Dodge AVCO 32' 1979 motorhome. I noticed that the factory has installed two tanks one in the back and one in the front. The generator is fed from the tank in the back. All I am trying to figure out is on most motorhomes with aux and main tanks in the norm what tank would a generator be fed from? Main or aux Thanks so much
  • I didn't read that sorry That was all I wanted to know. thanks so so so much.. Yes then the back tank is the main.. So,, I just put in fresh gas in the aux tank... and there was no gas in the aux tank... there is no gas in the rear either. Genny won't start and get no fuel to it. Mystery solved. Thanks again. sorry for the dumb moment
  • Veebyes wrote:
    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.


    I would be quite surprised if a 1979 Dodge AVCO motorhome was diesel powered. ;)

    Typical motorhomes, at least those with a single tank, do have the generator gas pickup at around 1/4 tank, so you don't empty the tank with the generator, hence the "almost empty" suggestion. I could see where that may not be the case with a dual tank setup, as you have a spare tank (at least in theory) should the generator run its tank dry.
  • 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.
  • 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.
  • i covered that in my post, in the other thread
    i told you the generator will be connected to the main tank

    but i also said the description of a front fill, running all the way to tank behind the rear axle, made it sound to me, that the rear tank was an add on aux

    i have never seen an RV mfg do that kind of fuel fill plumbing

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