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Hi
After 200 hours service, 912 uls with 400 hours.
On first flight, after about 2 hours of flight.
Suddenly 0 fuel pressure on cruise.
After adding electric pump no change and having coughs.
Down rpm to 4000 and the pressure goes a bit up to the minimum of range.
Mechanical pump has 4 years aged (new model).
New fuel pipes.
What is the reason?
Thanks,
Gil.
  • Re: Low fuel pressure

    by » 6 years ago


    New fuel pipes? If you mean hose you many have hose particles clogged up in a filter, the screen in the fuel pump. Particles in the carb bowl wouldn't cause the pressure drop, but since your having this issue I would highly recommend you look in the carb bowls for debris. You could have debris in the pump or in a supply line or a filter before the pump that is not allowing fuel to get to the pump in any quantity. The last item is I hope your supply hoses from the fuel tank to the fuel pump are not 1/4", but at least 5/16" to 3/8".

    This may help understand:

    https://www.rotax-owner.com/en/rotax-blog/item/21-rotax-5-year-rubber-replacement-the-installation-considerations

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


  • Re: Low fuel pressure

    by » 6 years ago


    Thanks,
    The first filter was clogged up.

    Thank you said by: Wayne Fowler

  • Re: Low fuel pressure

    by » 6 years ago


    Sir, I would like to know which rubberized items must be replaced at every 5 years.
    What about protection tubes, heat resistant hoses and spiral hoses? These should be change or not at 5 year hoses replacement?

  • Re: Low fuel pressure

    by » 6 years ago


    My question was about 914 F

  • Re: Low fuel pressure

    by » 6 years ago


    What is the difference between hoses part no 860982 and 860985 for 914 F engines

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