by GreenLake » Fri May 01, 2015 1:37 am
Mine ('63) seems to have a vertical reinforcement glassed onto the middle of the transom, making that section thicker.
I suggested you source a complete drain assembly rather than messing with brass pipe. If you prefer to make your own, bronze would be more corrosion resistant than brass. Or use nylon or whatever the plastic is that's used for fitting like that.
For the thickness of your transom (which is the one that counts, and there's no guarantee that even boats of the same era are truly identical) I would suggest a pilot hole. Something really small, so that you can seal it temporarily with a bit of duct tape while your drain is on order.
If the thickness doesn't match perfectly, it should be easy enough to either chisel / grind away a bit of a depression on the inside of the transom, or, conversely, add a bit of laminate to increase the thickness to match.
~ green ~ lake ~ ~