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  1. #1
    Rockt3
    Join Date
    Jun 2007
    Location
    Geneva Fl
    Posts
    4

    2005 STX 12F won't run over 5500 RPM

    Had this ski in the shop last season . Had to have new pistons installed, burned a hole in one . Ski only has 100 hours on it. Got it back , motor would only rev out to 6200 rpms and could only go 50 mph compared to the 7200 rpms @ 60 mph it used to run .Took it out the other day , first time this season . Now it will only do 5500 rpms @ 42 mph. Any thoughts comments appreciated.
    Thanks


  2. #2

    Join Date
    May 2014
    Location
    Hervey Bay Queensland Australia
    Posts
    17
    +1
    4
    Check compression on all cylinders

  3. +1 by:


  4. #3

    Join Date
    May 2008
    Location
    Sweetwater
    Posts
    887
    +1
    139
    +1.. Then do a leakdown test..

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