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Oil pressure gauge

in 912 / 914 Technical Questions 5 years ago
I have a “jittery” oil pressure gauge. This occurred on previous 912ULS and after installing brand new 912ULS it still does it, so I don’t think it can be earthing at the engine end.
Any thoughts appreciated.

  • Re: Oil pressure gauge

    by » 5 years ago

    It is inherent in the design of the oil pressure relief valve read this.

    https://rotax-owner.com/en/rotax-forum/3-4-stroke-technical-questions/6674-oil-pressure-fluctuations#19254
    Thank you said by: Bill Hertzel
      
    Report

  • Re: Oil pressure gauge

    by » 5 years ago

    What type of plane and what type of sender? How old is the engine? Some are because of old senders, some are because of poor grounds or connections and some are from the wrong application selection in the instrument like a Dynon. Had issues lately with Vans RV12's. They didn't connect the third wire. A ground.
    It is possible that it could be the old style ball bearing, but you can install the new style mushroom shaped oil pressure regulator. Cheap and easy to try.

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

      
    Report

  • Re: Oil pressure gauge

    by » 5 years ago

    It’s a spitfire replica. The engine is 6 months old so has new Seder and oil regulator. But it did the same on the old engine which was 2006 (although it does jump around less on the new engine)
      
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  • Re: Oil pressure gauge

    by » 5 years ago

    What kind of instrument are you using? If it's the same on two different engines then maybe it's the gauge. It may need a resistor or a different setting.

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

      
    Report

  • Re: Oil pressure gauge

    by » 5 years ago

    It’s a VDO.
      
    Report
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