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Leaking Fuel Pump Question

in 912 / 914 Technical Questions 12 years ago
Last time I flew, while pulling the prop through to burp the engine. I noticed a small amount of fuel dripping from the back side of the fuel pump from the lower vent holes.

Does this mean the pump is bad or beginning to fail?

[hide]Rotax 912UL and 13 years old.
[/hide]

Thanks

  • Re: Leaking Fuel Pump Question

    by » 12 years ago

    If its the Older Fuel Pump, I would just replace it. Mine slowly failed with Intermittent Lower fuel Pressure, then total faulire inflight, good thing I had the powered backup.
      
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  • Re: Leaking Fuel Pump Question

    by » 12 years ago

    Hi Wellslake,

    Yes it's on its way out the door so to speak. You will need a new pump. When you install one of the new pumps make sure your plane has a re-circulation line. You will probably notice higher fuel pressure with the new pump around 4.5 psi+/-

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

      
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  • Re: Leaking Fuel Pump Question

    by » 12 years ago

    Thanks Roger!

    [hide]Without the provision of recirculating lines, is the pressure too high for the carbs? At the moment I do not have recirculating lines. Could the new style pump be installed without them and retrofitted at a later date?
    [/hide]
    Wells
      
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  • Re: Leaking Fuel Pump Question

    by » 12 years ago

    Hi Wellslake,

    Yes it could cause a little over pressure/flooding of the carb. It isn't hard to put a re-circulation line in. Do it at the same time. I wouldn't wait. A flooded carb in flight won't wait.

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

      
    Report

  • Re: Leaking Fuel Pump Question

    by » 12 years ago

    Use of an electric fuel pump (if you have one) will cause gas to flow out that weep hole. Happened to me on a cross country. Gas all over the engine. Not good.
      
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