Can't start the boat

[awthacker]

Hope you guys don't mind me bumping this thread back up. I need some advice on what to do now that I've opened up the heads and found some nastiness inside.

I would summarize the options as: A) start the rebuild process and hope I learn something and not completely destroy my engine, or B) bring it to a mechanic for a rebuild.

Maybe rebuild is not what I need, but I'm not sure how I can get all this crud cleaned out without completely tearing it down, and I'm also not sure that I've found the source of the corrosion. I'm now guessing that the fitting I thought looked like a sensor is actually some kind of water jet/nipple for the cooling system and maybe the bad o-ring on it led to saltwater throughout the heads?