I put ball valves in mine 2 years ago and they did fine last winter, can't comment on the longevity but at least you can reach them easy enough and still rod them..
My last sailboat was an Oday 27 and a keeper. I recently gave her to a boy scout camp. I'm old and she still has another chance to make some kids happy. Oh, and she could out sail Catalina 27s on most any day...
I may be wrong, but I think the galvanic difference would accelerate corrosion of the cast iron...May not be enough to matter considering the normal life span of either part..
Yea what Lou said, at least get the drive off and pull the bearing. Buy new parts over winter and put it back together in the spring. And Danforth..he snuck in..
I had water dripping out of the lower shift cable at the shift plate. Water was getting past the o ring in the drive and forced into the cable when running..
You need to understand that water is heavier than oil. You have pumped a mix of water and oil to every bearing in the engine. And as it sits the water settles and displaces any oil on the surface of the bearing surface and then the rust begins..
Well I think you have come to a decision making time for your project. You must realize that every bearing surface is pitted from rust and you need some new parts..