Here's a pic of an area that blows bubbles when I pressure tested the hull ('77 H16). This is the lip of starboard hull/deck seam about a foot forward of the shroud ( the hulls upside down). Last weekend this hull took on several gallons of water over a period of about 9 hours, in rough sea sailing in Narragansett Bay, RI. On calmer waters I didn't notice the leak. There's one other much smaller spot near the stern that also leaks.
Searching the forum I think this can be fixed with epoxy resin and a coat of silicon rubber. I'm thinking of applying some suction to the hull to try draw the epoxy into the seam. Any thoughts or suggestions would be appreciated.