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I had a fuel return line installed in my kit fox after I replaced the old pump with the new one. Subsequently, on a long flight (3 hrs) I noticed that one wing tank was full and the other one nearly empty. (yes, I was flying straight.) the full tank is the one with the fuel return line. I made a precautionary landing, the plane seemed ok, I added fuel to the low tank and headed home not knowing the cause but suspecting the return line. I put the plane in maintenance and :unsure: Now the plane has NEW wing tanks and there are fuel return fittings in both wings per my request to the mechanic. If I split the fuel return line to feed both tanks, am I decreasing fuel pressure in the circuit in a bad way?

Should I just feed one tank like before and see what happens? I'm at a phase where adding the extra line is easy.
  • Re: dual fuel return lines needed.

    by » 11 years ago


    Hi Jay,

    The return line to only the one tank was what was filling it up. Having two return lines won't hurt because the line restrictor meters the fuel. You'll have to fly it now and see how the two line setup affects each tank. Another way some handle this is with a fuel selector switch or you could put a small header tank in and plumb it to that. Since you have already installed the two tank setup test fly it and see how it feeds. If it solves your problem then you're good to go.

    Roger Lee
    LSRM-A & Rotax Instructor & Rotax IRC
    Tucson, AZ Ryan Airfield (KRYN)
    520-349-7056 Cell


    Thank you said by: jay white

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