I haven't done the homework to have a better suggestion. I just know there are too many installation and environmental variables that will often lead to a leak. It's a piss-poor method to make a drain that carried over from old-school boat building. The method should have gone away 30+ years ago.I will ask on Monday... if you have any recommendations on what I should listen for or ask for, please let me know.
I saw a new Grady in Anchor Marina in northeast Maryland. Really nice boat , had a s.s. Cap on the transom. It was polished to a mirror finishStainless in contact with the aluminum engine would cause galvanic corrosion.
They said they will drill the new transom where the original holes were (the inner splash well skin is original, so the original drain holes are there) and insert a tube bedded in 5200.I like the SS two piece ones but having them in glass is the key.
It's been a while since I've torn out a few. I can't say for sure if 5200 was the solution from the factory. If done correctly, I think it can work well, but the set I tore out was far from correctly installed. The holes were drilled at an angle; the fittings were over flared and cracked; there was little to no adhesive or sealant.They said they will drill the new transom where the original holes were (the inner splash well skin is original, so the original drain holes are there) and insert a tube bedded in 5200.