The scupper blocks in my 74 Tsunami were big one piece blocks of fir bedded in some putty,with a real lousy applied layer of glass.They were both rotted and needed replacement.
I ended up using a piece of 6x6 pressure treated yellow pine that I had laying around for years.It was a solid piece with no splits and was dry as a bone.
I shaped it to the dimensions needed,marked where the holes needed to be,and drilled them on a drill press.
I gave them a couple coats of epoxy resin on the outside of the block and the inside of the holes and bedded them back in place.
I Re-installed new tubes basically the same way McGillicuddy did.(thanks for the great pics Gillie)
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All this,just for a boat ride
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