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  1. #1

    Stx 900 lack of speed and power

    Hello, So i took the jet skis out for a third time and i couldnt get the stx over 35mph, dont know why or whats going on i know this will be hard to diagnose over a forum but any ideas what i should look for or into to find out what the problem is?


  2. #2
    steve45's Avatar
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    Welcome aboard, Diego!

    The first thing to do is pull the spark plugs and see if they're fouled. This is quite common if the engine is idled for long periods of time. While you have them out, it would be a good idea to perform a compression test. Make sure you ground the spark plug wires and open the throttles.

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