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‘73 transom motor mount holes repair

Discussion in 'Catalina 22' started by Sacto Dave, Jul 10, 2018. Add this thread to a FAQ

  1. Sacto Dave

    Sacto Dave

    Joined Apr 22, 2016
    139 posts, 32 likes
    Catalina 22
    US Folsom Lake
    There were 10 extra holes where my motor mount was secured. They were sealed with silicone on some, dowels and filler (gelcoat?) on 4 others.
    17845AB1-BE31-4A15-9FF8-E662DFD2D1FB.jpeg
    I removed the mount
    65A6093B-5028-4326-B12C-2795C42326B1.jpeg
    Punched out the wood dowels, drilled all holes to 5/16” and beveled the edges.
    FAE1077A-836D-448A-9AC6-BE3EE231E6DE.png
    I coated the inside of each hole first with thinned epoxy, then 404 adhesive filler thickened epoxy, buttered a 5/16” fiberglass rod cut to 1/8” depth of transom and liner for each hole, then covered with the thickened epoxy.
    3B9EFF08-D9DF-4029-BFA1-DE877A735BA7.jpeg
    Once cured, I sanded all gelcoat off the area.
    ADD19954-67CB-432E-B2E5-0ED7638D1115.jpeg
    Used marine epoxy filler to fill in the holes, then tried using an epoxy gelcoat for the first time. This is a learning process. I made up too much and since it was nearly 90° when I tried applying it, it went off too quick.
    B75EE2FD-BD10-4C20-8463-773C833C492C.jpeg
    D91FE501-DD58-4127-BDA5-52CD311111AE.jpeg
    It turned into cottage cheese and I tried to spread it. I’ll be doing some sanding and trying again.
     


  2. Rltgold

    Rltgold

    Joined Mar 2, 2018
    29 posts, 6 likes
    Catalina Wing Keel
    Minnie US San Diego
    Hi Dave,
    Just to back up a bit first. I would have beveled the edges of the hole inward as apossed to outward to give more grip to the filler.
    Next try spraying the gel coat for a smoother finish. Bottom line with gel coat is if you have enough on there you can always sand down the texture to get it smooth. Good luck.
     


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  3. Leeward Rail

    Leeward Rail

    Joined Mar 20, 2015
    1,428 posts, 290 likes
    Catalina 22 New Style
    CA SHYC, Lake Winnipeg
    Working out so far Dave !

    Preval sprayers work well for gelcoat touchups, when you don't have a spraygun. Easy enough to sand it smooth though. :)
     


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  4. Hardhead

    Hardhead

    Joined Apr 11, 2017
    167 posts, 46 likes
    Catalina C22
    US Solomon's Island
    Looks like great work to me. Honestly, I'd probably be okay with leaving the gelcoat as it is. A good bit of it is going covered up by the motor mount and outboard, and visually, I don't think it would even be noticeable under normal circumstances.
     


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  5. Rltgold

    Rltgold

    Joined Mar 2, 2018
    29 posts, 6 likes
    Catalina Wing Keel
    Minnie US San Diego
    Preval 's are good but not a lot of control. If you spray it on thick you have more control over sanding and feathering the edges. I start with 225 sandpaper wet/dry with a flat rubber block and work my way up to 2000 until I can hand sand the edges to feather it in.Then rub it out. Doesn't take that long. The most important thing is to not go through the old gel coat on the outside of the repair area.
    If your not worried about blending it in just Tape off the area. Apply the gel coat, sand it smooth ,rub it out and be done with it.
    When I bought my boat there had been lot's of BAD gel coat repair. Some spots just needed to be smooth out and buffed.
     


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  6. Sacto Dave

    Sacto Dave

    Joined Apr 22, 2016
    139 posts, 32 likes
    Catalina 22
    US Folsom Lake
    Second try. 69BFA47F-CB17-4FD4-A8DC-DA2D90F0193C.jpeg 27D43577-2B17-4344-85B3-5E9A480453D1.jpeg
     


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  7. T_Cat

    T_Cat

    Joined Aug 8, 2014
    306 posts, 63 likes
    Catalina 22 1987 New Design. 14133 "LadyHawke"
    US Modesto CA
    Looks good!
     


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  8. Sacto Dave

    Sacto Dave

    Joined Apr 22, 2016
    139 posts, 32 likes
    Catalina 22
    US Folsom Lake
    Well, this did not turn out as I hoped, but as I’ve heard it does. My local fiberglass repair advisor, a friend who owns five boats and last year used a sprayer to apply gelcoat, had his turn out with an orange peel finish, which he sanded smooth.
    FACE5254-21E2-4000-8387-B0E0D00773E6.jpeg D18A2787-1EE6-4799-A3BE-5E939458248B.jpeg 2C1DC04F-93D9-496F-B8A5-EA99B87261F4.jpeg
    I suspect I have not thinned it enough, but my whole mixing process is a series of approximations.
     


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  9. Gene Neill

    Gene Neill

    Joined Sep 30, 2013
    2,333 posts, 838 likes
    C-22, Albin Vega
    US central Florida
    Looks good to me! Good color match, too. Bust out the sandpaper! Gelcoat is soft, you can sand that down to a mirror in no time. :thumbup:
     


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  10. Sacto Dave

    Sacto Dave

    Joined Apr 22, 2016
    139 posts, 32 likes
    Catalina 22
    US Folsom Lake
    Well, it has been a week of slow progress. I’m not a fan of the heat and it was over 100° a few days. I wet sanded by hand this time, using 320. Took pics just before my final gelcoat application.
    65C62076-D1F5-4503-A2BF-0674EFCDEB48.jpeg 359BD48F-EEE2-4F9A-A819-F0A6DE0EA0E6.jpeg
    I went a little high on the acetone to thin the gelcoat, mixing it in before adding the hardener. Still has an orange peel finish, but it came out of the preval sprayer in a mist that seemed more fine and the globules of gelcoat flattened out better.
    F2ECC824-E065-4189-A142-C5C4B4D50E32.jpeg
    534B4963-1F51-4F9B-A938-DF23C0069E7B.jpeg
    More sanding now.
     



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