I have removed or overhauled 6 transom assemblies in my life time. Most were Alphas. My last two were Bravos. Every transom seal was flattened and appeared to have lost its pressure to provide positive pressure where needed. Salt water will find any opening and eventually rot wood. The best materials to use in rebuild is total synthetic (not plywood), but it is expensive. Most transoms require at least 2 4x8 sheets at about $300 each. Marine ply is < $100 each. I used epoxy on ply and coated all wood, even the 1/2" transom stud holes. As an extra precaution, I am caulking gimbal housing to transom. It may not be a common practice and looks like crap, but provides me some degree of more sleep at night. My drain hole area is epoxy/silica mix with fg matt/cloth and covered by 1808. Saltwater will never leach into the ply (I hope) at the drain. But at 70 years of age, I suspect I will be dead before any wood rot screws up my fishing. I don't plan on selling the boat. If your motors are saltwater cooled, I doubt that you will get anything for them. I feel your pain. I have been where you are more than once. There are plenty of folks like me on this forum who can help you out. This aint rocket science! If it is hot where you live you and you will be rebuilding, invest in a large fan and awning. Air tools are great, especially an air chisel, but not necessary. You will need an engine hoist and motor stand. That is an extra expense. Good luck.
