Salt water used????? You need to manually raise and lower it by jumping solenoid. I have replaced too many of them. They don't like salt water dripping on them. Rebuild rams with new seals. Easy to do! If that doesn't work, replace fluid and pray trim motor doesn't need replacing.
Make sure you don't have any transom or stringer mount rot. If you have ANY, you should stop and replace rotten wood, re-glass, etc. Trust me!!!!!!
I had problems one time due to not seeing a part of the back motor mounts getting bumped off while trying to lower engine onto mount. I believe it...
add y pipe flappers and/or increase exhaust manifold thickness by double the gaskets. Your manifold or head may not be perfectly flat. However, I suspect Y pipe shutters (flappers) will reduce cold water entering an exhaust system.
Having owned several I/Os over decades that were all saltwater used, rigorously fresh water flushing after every trip will increase block mortality to over ten years and maybe 4-6 years for risers and exhaust manifold. The risers are the first ones to crap out. I'd replace every 4 years and...
Go to information forum for technical information of transom rebuild. I can't remember what it is called, but that is where I got my information. Good luck.
