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  • Re: Fuel pressure sensor install

    by » 5 months ago


    Unlike the oil pressure sensor (fitted directly to the engine) the fuel sensor is usually plumbed in to the fuel distribution manifold or a T fitting in the delivery line. So the fuel sensor already has a high degree of vibration damping, courtesy of the "rubber" fuel lines.

    If you elect to remote mount the fuel sensor (firewall), consider fitting a small aperture restrictor jet, in the fuel line (usually at the manifold/T fitting) - this will dampen fuel pump pressure pulses and hopefully deliver a steadier, more accurate, pressure reading.


  • Re: Fuel pressure sensor install

    by » 5 months ago


    Hi Roger,

    Thanks for your informative reply.  You said "I now mount the fuel pressure sender above the engine on the firewall. The sender now faces up and not down".  When you say the sender faces "up", do you mean that the fuel port on the sender is "up"?  I would think that the fuel port should be "down" so that (as you say) the fuel will drain away from the sender and not collect in the sender?

    Another question...  Does fuel actually reach the sender, or is there trapped air in the fuel line that connects to the sender?  How does the air get removed from the line if the fuel sender and hose to the port on the engine is connected to the engine before it is first started?

    Mike


  • Re: Fuel pressure sensor install

    by » 5 months ago


    Hi Michael,

    The end that the wire connects to is up and the fuel inlet side is down. Any air will work its way out of the line or loosen the fitting where the fuel enters the sender to let the fuel drool out and turn the pump on and let the fuel force the air out. Either way works. When I did it this way I never had another issue for 1500 hours.

     


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


    Thank you said by: Michael Tucker

  • Re: Fuel pressure sensor install

    by » 5 months ago


    Thanks very much, Roger.


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