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  1. #1

    Strange noise on FX SHO 2010

    Hi,

    I bought a Yamaha FX SHO 2010 with around 60hours in a very good condition. Just one thing sounds a little bit strange to me.

    Starting from 40mph and only if the ski is warmed up, I can hear a soft-howling or whistle. I can't hear it below 40mph or if the motor is in cold condition.

    Is this normal? Would be happy about any help.

    (Sorry for the English, I'm not a native speaker)

    Cheers

    Alex


  2. #2
    I'm with the cool kids Mowerpan's Avatar
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    Sounds like the supercharging winding up and building boost like it should. Usually starts just over 5k rpms.

  3. #3
    Quote Originally Posted by Mowerpan View Post
    Sounds like the supercharging winding up and building boost like it should. Usually starts just over 5k rpms.
    Thanks Mowerpan for the fast reply. But it is a permanent noise which only appear over 40mph and only after few minutes of driving. It doesn't appear within the first 10 min, even if the speed is over 40mph during this time.

    Still not sure if it is normal.

  4. #4
    Could it be a bearing of the supercharger?

  5. #5

  6. #6
    Boost leak?? I have heard some funny noises from cracked intake pipes. How does the ski run?

  7. #7
    Hi Doug,

    the ski runs perfectly without with around 70mph and without any problems.

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