fbpx

 

I got a alert on the Skyview System that the fuel pressure on the 912uls was too high.  6.1psi.  It returned to normal limits when I reduced the throttle.  What are the dangers of too high fuel pressure?  Other then a sender issue, what are the possible causes?

  • Re: Fuel pressure too high

    by » one month ago


    Excessive fuel pressure can over power the Carb Float Valves causing the float bowls to overfill resulting in an excessively rich fuel mixture.
    Does your fuel system have the, Now Required, Fuel Return Line with the Restricting Orifice installed?


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


  • Re: Fuel pressure too high

    by » one month ago


    Yes I have to restricted orifice.  I think I will just watch this situation since it only happened today during throttle reduction and then was normal after landing.  I was more worried about whether too much pressure could cause power loss.  Otherwise engine runs great.  Ken


  • Re: Fuel pressure too high

    by » one month ago


    From the Installation Manual:

     

    Fuel pressure in excess of stated limit can lead to an override of the float valve with subsequent engine stop.

     

     


  • Re: Fuel pressure too high

    by » one month ago


    6.1 psi is under the 7.2 max. Sounds like you need to reset the high psi alert number on your Dynon. The average person seems to run between 3.5 psi - 5.8 psi. Some of these variances with people's individual plane is caused by a poor reading sender, poor ground connection, brand of mechanical fuel pump, do you have an electric one and is it on, or the recirculation hose orifice size, if you even have a recirculation line, vapor lock occurrence, ect... So some variation can happen.


    Roger Lee
    LSRM-A & Rotax Instructor & Rotax IRC
    Tucson, AZ Ryan Airfield (KRYN)
    520-574-1080 Home (TRY HOME FIRST)
    520-349-7056 Cell

    Thank you said by: RotaxOwner Admin, Kenneth Boyd

You do not have permissions to reply to this topic.