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  1. #1

    F15x RPM Cut off ??

    I have a pair 08 f15x. One is stock and one has a few mods.
    They both have the same top speed (67mph) and are equal when raced on flat water.

    The stock ski holds 6450 rpm at top speed
    The modded ski feels restricted as the rpm's go up and down at top speed.
    They are going back and forth from 6800 to 6300 and the ski surges.

    As far as I can see it has ride plate machined, intake grate modded. Cone air filter and breather. I also put a straight pipe exhaust on it.

  2. #2
    Join Date
    Jan 2008
    Currituck, North Carolina, United States
    I believe it's 6700.....sounds like you need to re pitch prop some as your on limiter

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  4. #3

    Join Date
    Jun 2012
    canada qc
    mine run 6940/6960 rpm and running good . not completely sure but the soft cut is 7000 and hard cut at 7200

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  6. #4
    Derek45's Avatar
    Join Date
    Feb 2014
    MO. Mark Twain, LOTO

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