1971 19' Trisonic tri-hull,Mercruiser 888, Ford 302. I have the engine out to replace a leaking Y pipe. While it's out is there anything else I should do or check. I found a small pocket of dryrot at the bottom of the transom that I'll repair. Also, I don't see the spiral wrap around the shift cable but I found a piece of it under the driver's seat. I guess the previous owner did not bother to replace it when he did his work.