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Electric pump

in 912 / 914 Technical Questions 6 years ago
I need to replace my old electric backup pump.
Can anyone tell me what pressure pump I need d how many litres per hour is acceptable?

  • Re: Electric pump

    by » 6 years ago

    Rotax engines seldom burn more than 25L an hour.
    Fuel pumps seldom pump less than 75L per hour.
    It will be hard to find any pump that can't supply the volume.
    The pressure is the determining factor.

    The easiest way to know what you need it to see what you already have.
    What pump is currently installed?
    Otherwise, we will at least need to know what engine the fuel pump is for.
    912? 914? ???

    Bill Hertzel
    Rotax 912is
    North Ridgeville, OH, USA
    Clicking the "Thank You" is Always Appreciated by Everyone.

      
    Report

  • Re: Electric pump

    by » 6 years ago

    Oh it’s for a brand new 912ULS.
    The current pump is from a 914 and the pressure is too high
      
    Report

  • Re: Electric pump

    by » 6 years ago

    You need a pump in the 3-5 psi range and definitely nothing over 7psi or you will risk overpowering the carb float valves.
    A 912ULS will burn less than 25L per hour even on a very bad day.
    I doubt you could find any pump that could not keep up with it with less than a 2 to 1 margin.
    Most will give you a 3-4 to 1 margin.

    There are literally more choices in the 100L per Hour at 5psi range than anyone would ever need.
    This is considered a "Life-Support Device" in my opinion, so I do not recommend that you cheap-out on the quality of the pump.
    Choose Wisely!

    Bill Hertzel
    Rotax 912is
    North Ridgeville, OH, USA
    Clicking the "Thank You" is Always Appreciated by Everyone.

      
    Report
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