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Hi,

I bought a small FAETA NG Ultralight from ATEC - a truly wonderful airplane.

The airplane is fitted with a ROTAX 912iS engine. However, the fuel pump is making a horrible loud sound, its very noisy. -and, even more when I turn on the aux pump!

I was wondering if any of you have experience with solving and/or minimising the noise? Could be some simple tips and tricks, special mount? -really anything would be appreciated? Can I wrap it, insulate around it, mount it one something? 

Tnx in advance for sharing.

BR

Michael Rubio

  • Re: Fuel pump noise

    by » 4 weeks ago


    Is the Fuel Shut-Off Valve OPEN???
    They are not meant to run dry.
    Are you seeing fuel returning to the tank from the Fuel Regulator return hose?
    What Fuel Pressure are you seeing?


    Bill Hertzel
    Rotax 912is
    North Ridgeville, OH, USA
    Bill.Hertzel@Yahoo.com
    Clicking the "Thank You" is Always Appreciated.


    Thank you said by: Michael Rubio

  • Re: Fuel pump noise

    by » 4 weeks ago


    May be loose in its mount and shaking when on or like Bill pointed out no fuel.


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


    Thank you said by: Michael Rubio

  • Re: Fuel pump noise

    by » 4 weeks ago


    Tnx for your inputs Bill and Roger, your input is VERY much appreciated :)

    I have made a video where the noise can be heard, both from my friends airplane and mine. Just in case its supposed to sound like that.

    I see 2,6 bar - the noise is like in the linked video when flying, so I guess the flow is correct?

     https://www.dropbox.com/sh/9tu23tv9unmym68/AADUTjuagF6VGPEQa3ZI8UYKa?dl=0

     


  • Re: Fuel pump noise

    by » 4 weeks ago


    Your friend's pumps sound normal
    Your pumps are screaming!!!
    They sound like they are drawing Air or Cavitating. (Or running on 24 volts!!!)
    Are you circulating Fuel?
    "I believe so", is not the correct answer.

    Pull the Fuel Line off the Fuel Regulator output and re-direct the flow into a small container.
    You should see one Liter delivered every 30 ± 15 seconds.


    Bill Hertzel
    Rotax 912is
    North Ridgeville, OH, USA
    Bill.Hertzel@Yahoo.com
    Clicking the "Thank You" is Always Appreciated.


  • Re: Fuel pump noise

    by » 4 weeks ago


    Michael Rubio

     

    This has been a past complaint from others and you do not have to do any testing.

    Please fill out a CSIR report form on your fuel pumps found below:

    https://www.rotax-owner.com/en/40-uncategorised/110-csirqa

    And submit it to your local distributor (Franz Aircraft Engines Vertrieb GmbH) 

    info@franz-aircraft.de

     

     


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