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I found a picture of a 22 Revenge I had looked at last year, and saw a clamshell low, just below the lower chine. While not definitive, this area is clear on my hull, and there is no drain here.

That said, here is what it is looking like. It looks like a previous owner closed this drain from the inside. I have spent several hours removing what looks to be a wood and epoxy plug. It had collapsed into the hull. I have had to drill holes through the plug, which was incredibly difficult, in order to get holds to break it apart with needle nose pliers.

I broke 2 pliers in the past several hours. The stuff was black and from a short distance, looked like iron ore.

I have one more piece to get out. I will try to post pictures, but I am leaving on a business trip later today.

When I return, I will look to make a more permanent repair.

Unless the terminating end of the drain suddenly appears, I doubt I will look to put in a through hull.

I recall reading about somebdoy else going through a simila exercise.