OMC Saildrive 15 hp
I had an OMC saildrive on my Lancer 29. I know where you are coming from with your heating problem. You motor is needing a complete overhaul. It is cloged up from years of faithful service. It is a basic Johnson 15 hp powerhead so you could do the job yourself or like me give up on that motor and move onto a moretrustworthy motor. I am sorry but this motor doesn''t have the best reputation and from my experience I think it deserves it. I love the idea of sail drive but there are better ways to go.
Take a look at www.saildrive280.com much better system...