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Evinrude engine problem

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  • #1

    Evinrude engine problem

    Looking for some help with a 1989 Evinrude 110 HP. When the boat is in the water at a moderate RPM (2000-3500 or higher) there is a shake or pulse of the engine every 5 to 7 seconds that causes everything to jump. It does not happen at idle or when it is out of the water. Posted two views on YouTube if anyone has any suggestions. Starts great and runs great except for that shake.
    Changed coils, plugs and wires already as part of a tuneup. Thanks for taking the time to look!

    boat vid 1/3 - YouTube

    boat vid 3/3 - YouTube
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  • #2
    Same issue

    Please let me know what you find as I have a late 80's model 40hp doing the same thing.
    Thanks

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    • #3
      Turned out to be a worn clutch dog and forward gear, on the lobes where they connect. Replaced parts and good as new.

      Evinrude engine problem


      https://www.youtube.com/watch?v=020F6DfPyog

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