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  1. #1

    Yamaha '05&'07 FX HO Cruiser RPM 9600

    Hi All

    These are my first ski's.
    2007 ski 13 hours
    2005 ski 75 hours

    I bought the 2 ski's 3 weeks ago and the '07 ski had too much oil in it and an oil change was done by a yamaha dealer.They also did a plug change but no air filter change.They also added a fuel stabilizer.
    Both ski's had an oil and plug change.
    I took the ski's out and the '05 ski did +-90 km/h at 9600 rpm without an air filter.The '07 ski was slower and had less power so I removed the air filter, full of oil and did a run again.
    This time +- 85 km/h at 9500 rpm
    Went back home and I did a spark plug change on the '07 ski(plugs black and wet with fuel).Think this is because of the clogged air filter.
    Took the '07 ski out again with new plugs and without an air filter and still the same results.

    My question is,is 9600 rpm normal or too low because both ski's have the same rpm limit.

    I weigh 120 kg and +- 50lt fuel onboard when tested.

    Thanks in advance.


  2. #2
    Ski Hacks MG's Avatar
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    +/- 10,000 RPM's is normal for an FX-HO. The low RPM's on the other ski may be indicative of too much oil or possibly an obstruction in the pump or on the shaft/prop. Have you checked the props?

  3. #3
    Thanks CCW

    Checked both ski's when hot and oil level were halfway between full and low level.
    So even if the ski is loaded it will rev 10000 rpm if I understand correct.

  4. #4
    Another question,if ski have too much oil in it and filter is removed,will it still keep the rpm down?

  5. #5
    Tennessee's Avatar
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    Quote Originally Posted by cropduster View Post
    Another question,if ski have too much oil in it and filter is removed,will it still keep the rpm down?
    Yes, too much oil will lower your RPM's.

  6. #6
    Another thing,does altitude play a role in RPM and performance,tested the ski's at an altitude of 1250m above sea level.
    The reason I am asking is because both ski's run at the same RPM.

  7. #7
    volltrex's Avatar
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    Quote Originally Posted by cropduster View Post
    Another thing,does altitude play a role in RPM and performance,tested the ski's at an altitude of 1250m above sea level.
    The reason I am asking is because both ski's run at the same RPM.
    That is more then likely the reason for both ski's running at 9600 rpm. You will definitely loose rpm the more altitude you are at.

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