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Shakey shakey Prop Mystery -Hunter 34

Discussion in 'Ask All Sailors' started by markwbird, Mar 13, 2018. Add this thread to a FAQ

  1. markwbird


    Joined Nov 26, 2012
    886 posts, 178 likes
    Hunter 34
    US Berkeley
    I have a mystery. Recently a crew member slammed the tranny into gear while it was running fast. Instant heavy vibration. I had my diver remove the Martec folding prop and put on the fixed prop. Upon inspection of the Martec prop it appeared to be in perfect condition. The vibration with the fixed prop is different but still there. When the engine is first started there is some squeaking from under the boat but relatively minor vibration. This only happens while in gear. Reverse or forward. After about 10 minutes it gets bad. The engine shakes like an out of balance washing machine at about 1500 rpm. I pulled the boat and there is no obvious sign of damage. Nothing loose. No visible bend in the shaft. A small amount of play in the cutlass bearing.
    Does this sound familiar to anyone?

  2. pateco


    Joined Aug 12, 2014
    2,160 posts, 592 likes
    Hunter 31 (1983)
    US Pompano Beach FL
    His slamming it into gear may have shifted your motor mounts. Have your shaft alignment checked.

  3. kloudie1


    Joined Nov 6, 2006
    8,028 posts, 598 likes
    Hunter 34
    US Mandeville Louisiana
    And check the mounts as well. The shock may have torn the rubber loose from the steel in the mount

  4. MitchM


    Joined Jan 20, 2005
    684 posts, 94 likes
    Nauticat 321 pilothouse 32
    US Erie PA
    get rid of that crew too. unless it is the spouse..

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