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Prop Anode

Discussion in 'Big Boats' started by dfast7181, Aug 2, 2017. Add this thread to a FAQ

  1. dfast7181


    Joined Jun 15, 2009
    45 posts, 0 likes
    Catalina 387
    US Waterford Harbor, Kemah Texas
    The anode on my 2005 C-387 keeps coming off. I have tried lock-tight and lock washers but it still comes off. I have been diving under the boat every month or so and every time the anode and the retaining screw are gone. Any ideas?
    By the way, To all who posted on my oil leak problem thanks for the input. I still have not found the problem, even baffled Yanmar, but when I track down the source I'll let everyone know.

  2. Maine Sail

    Maine Sail Moderator

    Joined Feb 6, 1998
    10,807 posts, 613 likes
    Canadian Sailcraft 36T
    US Casco Bay, ME
    If this is a shaft anode you should begin checking for a DC leak or the prop, strut and shaft are all at risk..

  3. Ralph Johnstone

    Ralph Johnstone

    Joined Jan 4, 2006
    2,442 posts, 275 likes
    Hunter H-310
    CA West Vancouver, B.C.
    Until you do find the cause of the problem (assuming excessive corrosion) install another anode close to the first and even a zinc fish over the side just to be safe.

  4. dfast7181


    Joined Jun 15, 2009
    45 posts, 0 likes
    Catalina 387
    US Waterford Harbor, Kemah Texas
    Thank you for the input. I have been using the "fish" but it shows little or no corrosion. Unfortunately there is no room for any other anodes between the prop and the skeg where the shaft/tube comes out of the hull. (and no strut) The anode attaches to the end of the shaft and screws into the end of the shaft/prop nut. I don't think corrosion is the problem I think it unscrews after shifting from forward to reverse to forward etc.

  5. jssailem


    Joined Oct 22, 2014
    7,820 posts, 3,132 likes
    CAL 35 Cruiser
    US Salem, Moored Port Everett WA
    Dfast. Maybe changing the style of anode would help. Try the donut style.
    It might fit in the space you have.

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