fbpx

 

I have a Rans S7LS with a 912ULS.  My oil pressure has always run between 65 and 72 lbs.  Recently, it has climbed to 75 to 82 lbs.  I believe I need a new VDO oil pressure sensor, and I have ordered one.  My question is, once I have the new sensor, is there a way to adjust the oil pressure to the 50 to 60 lbs range?

  • Re: Oil Pressure

    by » one month ago


    No there isn't, but I bet the new sender will fix the problem. 


    Roger Lee
    LSRM-A & Rotax Instructor & Rotax IRC
    Tucson, AZ Ryan Airfield (KRYN)
    520-574-1080 Home (TRY HOME FIRST)
    520-349-7056 Cell

  • Re: Oil Pressure

    by » one month ago


    Roger, what do you think about this?

    If one increased pre-tension of the spring by adding a shim or two oil pressure would increase, I recall. Of course it would at best be a try but decreasing pre-tension (which I do not recommend) would lead to a lower level of oil pressure. One could try diffenrent springs altogether or perhaps cut of a quarter of a turn off and see what happens.
    Should anyone give it a try I'd be interested to learn how much of a difference a turn of the spring cut off makes.

    Peter


  • Re: Oil Pressure

    by » one month ago


    The spring has a preset tension just for our use so tampering with it could possibly cost you an engine. before you would even think about any alteration you would need to be absolutely sure about the gauge pressure. The majority of times the sender is the culpret for bad readings.


    Roger Lee
    LSRM-A & Rotax Instructor & Rotax IRC
    Tucson, AZ Ryan Airfield (KRYN)
    520-574-1080 Home (TRY HOME FIRST)
    520-349-7056 Cell

  • Re: Oil Pressure

    by » one month ago


    Remove the sender and replace it with a basic mechanical 100psi Pressure Gauge.  The type with a moving needle right on the gauge.
    Pressure is Pressure.  Any gauge will work as long as the threads match.
    1/8 NPT until  about 3 years ago when it changed to M10.

    This will give you a reliable pressure reading to compare to your  Electronics.
    It doesn't get much simpler.


    Bill Hertzel
    Rotax 912is
    North Ridgeville, OH, USA
    Bill.Hertzel@Yahoo.com
    Clicking the "Thank You" is Always Appreciated.


You do not have permissions to reply to this topic.