Brass scupper tube install

[BigLew]

Pardon my 2¢ worth but....
5200 is a great product. When it is used, it is often too good a product. A very good rule for using 5200 is to ask yourself, "Am I ever going to want to take this apart?" If the answer is yes, you might want to find something else.

IMHO, with regards to the scuppers, if it were me I would drill an oversized hole, put tape on the backside and tape on the outside covering the entire hole. Then I would punch a small hole through the tape at the top of the hole and using a large syringe I would fill the hole with epoxy. Let it cure. Drill it to the proper size. Put plenty of caulk on the scupper and seat it in the hole. That way, when you pull the boat you can check/change the caulk. No water should get to that transom. Just my 2¢.