Re: Through hull placement
I have found that over the years that the wood will rot no matter how good you seal it. Especially plywood. It will will be many years, but it will rot. Mostly because it is in a wet environment and fiberglass always has some microscopic porosity. It will take years, but it will rot.
My big concern is what if you do have to remove it for whatever reason. And I can site an example from a boat I fixed last summer. The repair involved repairing the shaft and strut that met up with some rocks. Amazingly, a scoop like yours was also torn right off the bottom. No damage to the hull, just the body of the scoop. Even the screws were still in the boat. My point is s**t happens. I have been on boats my whole life with nothing more than the thru hull bedded to a mahagony block. I applaud your effort, I just think it's way overkill and could make your life misrable in the future. Sorry if I scared you and for my rambling. I just came in from bottom painting the boat I use. Next year it's water based bottom paint for me.
Bill
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