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  • Re: 912ULS min Run-up temp issue

    by » 7 months ago


    the issue with cold oil in a Rotax 912 is more that it is too thick when cold and you get cavitation. Rotax is the only engine i have worked on that they suck / draw the oil through a long line and the oil cooler. you may note that when cold  you can drop the rpm and the oil pressure goes up. As it is an Aviation engine I run Rotax oils only. The cavitation can cause lifters to draw air  and lead to valve failure. I have had Rotax motors fail due to simple things saving a few cents  here and there. Valve failures destroying a motor at 600 hrs  take your time save your engine and life  a few min is not worth your engine or life.   


  • Re: 912ULS min Run-up temp issue

    by » 7 months ago


    An oil thermostat would make quite a difference.


  • Re: 912ULS min Run-up temp issue

    by » 7 months ago


    I would really consider installing a Tanis engine pre-heater. It's important and really helps when people live in cold country. It will help save the engine too from hard cold starts. I have installed a number of the Tanis engine heaters and is well worth the money if you live and fly in cold country.Watch the video.

     

    https://www.rotax-owner.com/en/videos-topmenu/product-reviews/149-tanis


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


  • Re: 912ULS min Run-up temp issue

    by » 7 months ago


    To clarify a few items:

    I do have a Tanis Heater and heat oil to about 50 degrees F prior to Start.

    Oil pressure is fairly consistent on start and cruise between 38 and 41 pig.

    Again, Oil intake grill is taped off about 3/4 with Duct Tape.

    Almost a half hour in mid 30's to 40 degree F seems rediculous just to get above 100 degrees F Oil Temp.


  • Re: 912ULS min Run-up temp issue

    by » 7 months ago


    I am really wondering about the accuracy of your temperature sensor and/or gauge.


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