[kerneltugboat]

From everyone I talked to, manifolds primarily used in salt water last 6 years tops, anything beyond that you are on borrowed time. My dad has the same package, 2000 mercruiser with a bravo one. He had the usual fuel pump issues early on, but has over 3000 hours with no major issues and it runs great. His manifolds went at 6 years and he flushes with fresh water after every trip. I would put new manifolds and run it until it starts giving you major problems. When the time comes, and you decide you don't trust it, then go new...outdrive and engine. I like mercruiser and Volvo. I would not go near the composite drive butt the new sea core othat looks like my dph drive is really cool.