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Solar vent

Discussion in 'Catalina 22' started by kclancy, Jun 3, 2018. Add this thread to a FAQ

  1. kclancy


    Joined Jul 25, 2016
    112 posts, 26 likes
    Catalina 22
    US Sacramento
    Hi All! The dorade on bow is cracked. Not a bad run for being 47 years old! I'm thinking of replaced it with a Marinco Day/Night solar vent or maybe a new dorade. Sort of leaning towards the solar vent because it might move more air. Any thoughts?

    Also, the existing hole is 3.5 inches, and of course the solar vent requires 3.75. Arrg! How would you enlarge this opening?


  2. markwbird


    Joined Nov 26, 2012
    845 posts, 160 likes
    Hunter 34
    US Berkeley
    I have the marinco. Kind of expensive and kind of cheaply made but still going after three years. As for making the hole bigger, use a hole saw to drill a couple of 3 1/2” plugs from a piece of plywood then switch to the 3 3/4 hole saw and load the plugs onto the hole saw to serve as a guide to fit into the existing hole as you cut the larger hole.

    Sanctuary2 and Leeward Rail like this.
  3. Jacktar


    Joined Sep 14, 2014
    630 posts, 225 likes
    Catalina 22
    US Pensacola, Florida
    I love my marinco, runs in daylight and charges up to run at night. Easy peasy install after the fortifying drink before making holes in the deck moment. Measure like 3 times and consider wisely before turning on saw or drill. new solar vent 2.jpg

  4. Hayden Watson

    Hayden Watson

    Joined Apr 5, 2009
    541 posts, 111 likes
    Catalina '88 C30 tr/bs
    US Oak Harbor, WA
    To enlarge the hole just put a piece of scrap plywood over the old hole and drill the new size. When you penetrate the plywood it will start the hole in the deck. Once the hole has been started, you can remove the plywood and finish the hole.

    Leeward Rail likes this.
  5. Leeward Rail

    Leeward Rail

    Joined Mar 20, 2015
    1,474 posts, 303 likes
    Catalina 22 New Style
    CA SHYC, Lake Winnipeg
    This works well, especially in areas with limited acess, as long as the saw blade is the right wall thickness.

    Depending on your mandrel, you can even use 2 hole saws on the same mandrel to make an even bigger hole.
    Use the smaller saw with the wood plug as the guide, and the second bigger saw mounted to the mandrel at the same time to create the hole size you need.

    Depending on the hole saw, it works well. Even when drilling steel plate.

    On the hatch I'd just use an old crap of plywood.

    Last edited: Jun 3, 2018
  6. Jacktar


    Joined Sep 14, 2014
    630 posts, 225 likes
    Catalina 22
    US Pensacola, Florida
    I just used a jigsaw and free handed it after marking the hole using the bottom for a template. The hatch is thick and you will be going pretty slow anyway.

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