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Shaft Coupler ?

Discussion in 'Ocean Yacht' started by Boomer, Dec 10, 2020.

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  1. Boomer

    Boomer Senior Member

    Joined:
    Oct 14, 2017
    Messages:
    671
    Location:
    Seminole
    Had a vibration on my stbd shaft...had shaft removed...the key way in the shaft coupler was not squared anymore and was rounding out...what would cause this?
  2. NYCAP123

    NYCAP123 Senior Member

    Joined:
    Mar 14, 2008
    Messages:
    11,218
    Location:
    Long Island, NY
    I'd say most likely hitting something but it could be a lot of things from bad cutlass bearing to the shaft not being true.
  3. Boomer

    Boomer Senior Member

    Joined:
    Oct 14, 2017
    Messages:
    671
    Location:
    Seminole
    Thanks...having the shaft checked for straightness, new cutlass bearing, and putting a new coupler on..hopefully that will remove the issue
  4. boatpoor

    boatpoor Member

    Joined:
    May 4, 2016
    Messages:
    111
    Location:
    32407
    More than likely the key wasn't fit properly the last time it was installed. Either it was too loose or the coupling was loose on the shaft.
  5. DOCKMASTER

    DOCKMASTER Senior Member

    Joined:
    Feb 26, 2012
    Messages:
    900
    Location:
    Ketchikan, Alaska
    Suggest you get a NDT check on the shaft end to ensure there are no cracks or indications.