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    Junior Member tedc's Avatar
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    Jul 2008
    Atlanta, GA
    2001 Islandia 240 Merc
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    Default Stuck in 10th gear

    My '01 Islandia with a 240 Merc is significantly slower out of the hole this year and I don't have a gauge to measure but my gas milage is significantly worse. The top speed is exactly the same.

    I'n no expert but I'm thinking impeller.

    Any ideas?


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    rookie101's Avatar
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    Jun 2008
    Okotoks Alberta, Canada
    2006 Yamaha AR230 HO 320hp
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    If the engine is revving higher than normal to get on plane, then yes it would be an impeller or wear housing problem. Clearance spec on it is .1 of an inch, or 2.54mm. Also any gouges or large dings in the impeller or housing will cause you to cavitate.

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