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    Impeller for Ultra LX

    After ECU and intake mods my ski is sitting at 7950-8000 RPM in glass water
    I think the engine's peak hp is falling off at that point.

    Any ideas what impeller to get to drop the RPM's by 400 or so? And hopefully gain some top speed...
    2013 Ultra LX.

    Looking here: https://www.solas.com/exec/msg.php?mid=62&cid=62&lg=E I see that there are no performance props listed for the Ultra LX.
    Is the only option the KX-CD-15/23 meant for the stock 250x? That might be way too much prop for the engine though.

    Skat Trak seems to have a 13/18 impeller: https://www.skat-trak.com/product/kawasaki-ultra-250-x-1318-155-75-20-swirl/

    Or does the 2013 LX have a 160mm pump? I guess I need to check somehow.
    EDIT: It seems that all Ultra LX-es have the 155mm pump.
    Last edited by prj; 08-04-2019 at 10:34 AM.


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