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Hello,

It takes ages to warm up my Rotax912UL and it is around 30 degrees C here.

I would like to know which oil thermostat is preferred or just tape it off with sticky duct tape again?

Thanks Jan
  • Re: Suitable oil thermostat?

    by » 11 years ago


    Hi Jan,

    30C is 86F. What do you consider a long time? If you have a fully exposed open air engine it is going to take longer to warm up than a tightly cowled engine and if that is the case your stuck with what it is. I would think a cowled engine warm up on a 30C, which is what my OAT are in the morning
    (here where I live) would be about 10 +/- minutes. Maybe 9, maybe 12. Of all the thermostats I have seen you save a couple of minutes and for me personally they are in the way of other maint, 2 minutes isn't worth the time and expense. I spend the 10 min. getting set for the flight and doing by pre-flight check and GPS programs. I'm sure other will chime in here and love them. I know some that have them, but most don't. The temp on the thermostat is set at 82C (180F). The people that have them tend to use Perma Cool model 1070. It's kind of like Chevy's and Ford's. You tend to like one, but not the other, but they both get you where your going.

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


  • Re: Suitable oil thermostat?

    by » 11 years ago


    Hi Roger,

    All good points! The only thing that is worrying me is that oil temp after climb and cruise is still at the end of the yellow zone. And what about winter............?

    Jan

  • Re: Suitable oil thermostat?

    by » 11 years ago


    Hi Jan,

    Do you have an open air or fully exposed engine or is it cowled? What is the oil temp at your yellow arc you are talking about? These would be helpful.

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


  • Re: Suitable oil thermostat?

    by » 11 years ago


    Hi Roger,

    it is a FK9ELA having a cowled engine. Oil temp is around 80 degrees C. CHT is around 90 degrees C.

    Thanks Jan

  • Re: Suitable oil thermostat?

    by » 11 years ago


    Hi Jan,

    80C is 176F and the oil thermostat will only get you maybe another 2C. So it won't help your issue. You need to reduce the amount of cooling air. The easiest way is to put a piece of 2" wide aluminum tape over the oil and or the coolant radiator. Many of us do this during the winter months and my winter temps are 210F. Try it and see what you get then get back to us.

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


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