1998 searay sundancer

As I pull up the floor to go down to the bilge area the rubber gaskets are just pealing away. They are in excellent condition and a little goo-gone takes the now slime adhesive right off. What can I use to re-glue them back on and not fall off because of the heat. This is rubber to fiberglass.

I realize the Merc 7.4 MPI 454 is no longer made and Merc does not have re manufactured blocks available anymore. Lost the starboard engine at the end of the 2018 boating season. Having the engine taken out and sent to a local machine shop for a tear down to see what the problem is (stopped...

Does anyone have an electronic copy of the owners manual for a 1998 370 sundancer. I am currently shopping and would like to develop an inspection checklist. Forgot to mention they are not available on Sea Rays website.

Selling 1998 310 50k.