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Rotax 912 ULS Oil Pressure Fluctuation

in 912 / 914 Technical Questions 10 years ago
We're concerned about Oil Pressure fluctuation on our 912 ULS (not yet in service).

It fluctuates within limits but is distracting.

Has anyone found the (new) Rotax-supplied mushroom valve piston to have solved the problem?

See: http://goo.gl/qNsJu1

  • Re: Rotax 912 ULS Oil Pressure Fluctuation

    by » 10 years ago

    Hi Richard,

    A couple of things may cause this.

    Yes you should upgrade to the new style oil pressure regulator, plug screw, spring and cone.

    A loose wire connection can cause this and a bad oil pressure sending unit.

    If the pressure moves up and down with the throttle make absolutely sure you have a solid ground. I have had a few that had a ground, but it was a poor one. Going to a known solid ground fixed the problem.

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

      
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