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Old 11-16-2008
morgantheship morgantheship is offline
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Raw Water Cooling System Questions

I am in the process of repowering my Hunter 27. It currently has a Renault engine which I will be replacing with a Yanmar 2GM engine. Yesterday I disconnected everything from the Renault engine in preparation of pulling it out of the boat. Let me prefice that there are two seacocks. One for inlet water and one (I thought) for outlet water. I noticed that only the inlet water cooling water line was connected to the engine. And the outlet water line ran somewhere else but was not connected to the engine. So I began to wonder what the outlet water line is connected to and what is the purpose of the outlet water line and its seacock?

The Yanmar 2GM engine that I will be installing is also a raw water cooled engine and I am wondering if it also will be connected the same way?

Could someone enlighten me with some understanding as to how this cooling system works and what I might need to pay attention to when installing the Yanmar engine? Thanks.
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