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  1. #1

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    15/23 impeller on Ultra lx 2018, anyone tested?

    I want higher cruise speed, dont need the acceleration. How do you think the LX will behave with KX-CD-15/23 impeller? Original impeller should be 10/16, so its way more pitch.

    https://www.solas.com/exec/msg.php?mid=62&cid=62&lg=E


  2. #2
    steve45's Avatar
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    I think you'll be very disappointed. That's a massive change. That impeller is for the Ultra 250/260. That means it takes about 100 HP more to drive it.

    If it were that easy to get more speed, Kawasaki would have just changed impellers rather than install superchargers.

    Contact Impros to get their recommendation.

  3. #3

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    i know that the impeller is for ultra 250/260, it depends of what kind of acceleration you want, it might be that Kawasaki dont want to sell new jetskis with slow acc, but it might work fine for me.

  4. #4
    steve45's Avatar
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    To go fast requires POWER. Speed is a function of power CUBED.

    Do what you want, and tell us how it goes. You asked what we thought and I told you what I think from an engineering standpoint.

  5. #5

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    Thanks for the input. in my eyes 150hp should be enough for more top speed with lower acceleration and lower load ( 1person ). because now i get max rpm with current impeller. if it hadn't power to get full rpm now there would not be nothing to speak about.

    And why Kawasaki dont do it, because the acceleration and the lack of power under load 2or3 person would do the jetski look very slow and powerless against the other brands. but i dont need think about that...

    but what to i know.

    Would be interested to find out if anybody have tried.

  6. #6
    steve45's Avatar
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    Well, I'm sure you can trade acceleration for a little more speed, but not much. The prop you intend to use is a radical change from stock. How much speed increase are you looking for? What is your top speed now?

    Try it, report back.

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