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Flickering Oil Pressure

in 912 / 914 Technical Questions 14 years ago
At cruise (5000rpm) our oil pressure gauge needle flickers but remains in the normal range. All other indications are normal.I suspect a bouncing pressure relief valve. Does anyone have any ideas about this - we have been told that this is normal behaviour with some engines. Engine time is 180 hours since new.

  • Re: Flickering Oil Pressure

    by » 14 years ago

    It could also be a defective oil pressure sensor or a break in the wire leading from the sensor to the gauge.
    Thank you said by: nicola di biase
      
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  • Re: Flickering Oil Pressure

    by » 14 years ago

    We also had problems with oil pressure readings and our local agent replaced the transmitter and installed a brass ring on the outside. I was told this stops harmonic vibrations affecting the resister. Not to sure if the mod is Rotax.
    Thank you said by: Ron Miller
      
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  • Re: Flickering Oil Pressure

    by » 14 years ago

    A bad ground will cause fairly large swings. Rotax has new parts for oil pressure stabilization. They are a new plug screw, replace the oil pressure spring and replace the old ball bearing with the new oil pressure regulator cone. I don't have that parts numbers with me right now as I'm out of town, but they are in the Rotax Parts manual or maybe someone else will have them at hand. )mushroom)

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

      
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  • Re: Flickering Oil Pressure

    by » 14 years ago

    I moved my $400 Honeywell transducer from next to the gearbox back to firewall and my oil pressure readings are now rock solid. I did try the mushroom shaped piece first and it did remove some of the bouncing but moving the Honeywell stopped it all.
      
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  • Re: Flickering Oil Pressure

    by » 14 years ago

    Remote mounting the oil pressure sender and fuel pressure sender off the engine will definitely help in longevity and stability. This is very easy to do.

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

      
    Report
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