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newer model fuel pump 893115

in General Tech Discussion 8 years ago
hello...I have just installed a new fuel pump model 893115 on a CTLS Flight Design with the 912 ULS engine. I am wanting to know what the normal fuel pressures should be? At 5.5 psi indication at 4000 RPM (on ground) I get the warning display of high pressure. On the older Bing AC pumps, normal range was 2.2 to 7.2 psi. Any guidance is appreciated.

  • Re: newer model fuel pump 893115

    by » 8 years ago

    Hi Richard,

    I also have a Flight Design. When you installed the new pump did you change the high alarm settings in the Dynon? The old alarm settings were only 5.8. If not this needs to be done. Normal for most FD CT's is between 3.7-5.7.

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

      
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  • Re: newer model fuel pump 893115

    by » 8 years ago

    thank you Roger, this is to be done. As well, after a 15 minute ground run to check for leaks in the lines before securing the firesleeve the jacket/housing on the fuel pump was very hot. I would not expect this even with heat transfer from the gear-box since fuel is going through the pump as the engine runs. Any thoughts, there are no noises etc from pump when engine running?
      
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  • Re: newer model fuel pump 893115

    by » 8 years ago

    Ground runs can (not always) build extra heat at times because there isn't the forced air over the engine like it is flying. The prop alone does not produce that kind of air flow.

    There is nothing wrong with a 5.5 - 5.8 fuel pressure with the new pump.

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

    Thank you said by: Richard Umpherson
      
    Report

  • Re: newer model fuel pump 893115

    by » 8 years ago

    Roger.. I am new to CTLS ownership and the LSA... I have been searching to find the procedure for resetting the Dynon's fuel pressure ranges with no luck, one link on Dynon's site does not work... my unit has the 10" Skyviews SV-D1000, any suggestions to a link?...
      
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  • Re: newer model fuel pump 893115

    by » 8 years ago

    Hi Richard,

    Call Flight Design Monday and gt the unlock code for the Dynon. Then go into the menu and just change it.

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

    Thank you said by: Richard Umpherson
      
    Report
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