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Thread: 912 Coolant

  1. #1

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    Default 912 Coolant

    There seems to be a lot of back and forth advice on coolant. Specific brands were recommended then discontinued. 50/50 mix was allowed then maybe not. Service Instructions / Bulletins were issued then supplemented.

    It looks like the latest information I can find on the 912 UL says to use Evans Aero Cool 180. There doesn’t seem to be a good on-line source for this in the US.

    I’m looking for the simple answer. Are US 912 UL owners buying Aero Cool from overseas or are you using other locally available brands allowed and recommended by Rotax?

    Thanks.

  2. #2

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    Default Re: 912 Coolant

    Of course I searched the threads before I posted my question and of course right after I posted it I found a thread where a dozen members recommended Dex-Cool. Any brand of Dex-Cool Orange will do?

  3. #3
    Super Moderator Av8r3400's Avatar
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    Default Re: 912 Coolant

    Dexcool (GM orange) coolant has been the recommendation from Rotax since day 1. All the brands are the same.

    Evans waterless coolant has fallen away from recommendation because the engine runs hotter and it is difficult to procure.
    Av8r3400
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  4. #4

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    Default Re: 912 Coolant

    What is the coolant capacity of the 912ULS?
    Will removing the plug on radiator drain all fluid and is a flush required? "Yellow Kitfox"

  5. #5
    Senior Member efwd's Avatar
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    Default Re: 912 Coolant

    My 912iS holds less than 1 gallon. I just bought the 50/50 blend. I believe I ended up with about 1/4 of it left maybe a little less.
    Eddie Forward
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  6. #6
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    Default Re: 912 Coolant

    Quote Originally Posted by jeffbock View Post
    What is the coolant capacity of the 912ULS?
    Will removing the plug on radiator drain all fluid and is a flush required? "Yellow Kitfox"
    We drained via the plug. Refilled a little. Turned the prop to circulate the old coolant. Drained again. Then filled.

  7. #7
    Senior Member jiott's Avatar
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    Default Re: 912 Coolant

    The maintenance manual says to remove the bottom ss bolt from the water pump outlet housing to completely drain the system. I never do; just drain the radiator plug and then flush with a garden hose, then refill with new.
    Jim Ott
    Portland, OR
    Kitfox SS7 flying
    Rotax 912ULS

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