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Old 20-04-2010, 20:13   #1
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Raw-Salt-Water-Cooled Diesel ?

I'm thinking of a sailboat with an old yanmar YSM8 engine. It might be 30 years old. It is salt water/raw water cooled. I'm thinking anything that old cooled by salt water should be problematic. What do you think?
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Old 20-04-2010, 21:16   #2
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Don't you mean MORE problematic?

The only thing I can say is that lack of problems with sea water cooled engines I've seen has amazed me.
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Old 21-04-2010, 08:15   #3
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While it seems like there should be tons of problems with these engines, there really don't seem to be that many problems. The YSM8 was a popular engine and I have never run across problems with the system, maybe someone who has worked on them more than I can say whether they have seen problems. As long as the coolant flow looks good, I wouldn't sweat it too much after asking around of people that work on the engines.

What boat is it in?
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raw water, salt water

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