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  1. #1

    Coolant replacement. Rookie mistake.

    So in a pinch I added regular car 50/50 coolant to my two skis because I couldn’t find a marine coolant on a Sunday. Fast forward a week later was told by a dealer that I shouldn’t have done that and should drain and refil with seadoo coolant. I agreed. Here is where the roomie part comes in. They said to just pull the drain plug from ride plate and drain it all out and put in new. No mention of air bubbles. I filled them up to about 3/4 inch above the seam in the coolant tank which is about 1/2 way between the min and max points. Fast forward to today when I took the skis out, came back home and there is only 3/4 inch of coolant left in tank. Way below the min line. I never got the overheat warning. Both skis are about the same level. Is that from the air bubble working their way out? Will it drop that much or do I have a leave. Did I mess something up by not bleeding the air bubbles out ahead of time?

    thanks in advance.


  2. #2

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    Fill up to the max, ride, check again.

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  4. #3
    ptscon's Avatar
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    Your dealer is just trying to scare you into buying their stuff. 50/50 antifreeze premix is the correct coolant, I use Prestone.

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  6. #4
    Myself's Avatar
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    Yep, the air bubbles are working their way out. As stated, just keep adding a bit until it holds steady.

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    I8A4RE's Avatar
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    Quote Originally Posted by ptscon View Post
    Your dealer is just trying to scare you into buying their stuff. 50/50 antifreeze premix is the correct coolant, I use Prestone.
    so 50/50 prestone is ok in a seadoo? i thought the ratio was different according to manufacture? How often should it be changed?

  8. #6
    ptscon's Avatar
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    Quote Originally Posted by I8A4RE View Post
    so 50/50 prestone is ok in a seadoo? i thought the ratio was different according to manufacture? How often should it be changed?
    It's perfectly fine, there's nothing different about these engines than what you find on a road vehicle. You can change it as often as the service manual calls for or as often as you do on your car, which is basically never

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  10. #7
    Thanks, I did just that and it held up today. All good now.

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