Thread: Exhaust Leak?
View Single Post
Old 01-16-2013, 10:47 PM
Lumbergh's Avatar
Lumbergh Lumbergh is offline
MC Fanatic
Join Date: Aug 2011
Boat: 1991 ProStar 190
Location: Seattle
Posts: 806
I used black RTV when I replaced my flanges with SS (the old style {94 and older} are NLA in poly 8 screw).

Did a bunch of reading and RTV was recommended a great deal. The idea being that 5200 is TOO permanent. The factory used some sort of clear silicone product.

Bunch of scraping with plastic putty knife and so on to get a clean surface to bolt the new flanges to the hull.

No issues with water leaking from flange area after all of that work.


Old, bad flange:

1991 ProStar / 351W with 1:1 Velvet Drive
Reply With Quote