Materials Not Included: Sea strainer, Teflon plumbing tape, sealant and through-hull with seacock. Performance Report: On my boat it lasted five years — far longer than for many pumps. It pushed 28 ...

Closed-loop cooling draws water from the sea in a similar way, but the way it circulates the water differs. Let's see how. Read more: The Most Reliable Duramax Diesel Engines (And Which To Avoid ...

It depends on the water body, the type of engine, and your budget. If you're running a boat on a freshwater lake and want to keep things simple, an open-loop system might be fine.