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Old 24-11-2015, 19:12   #1
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Yanmar Zinc

Seems that once beyond 3 cyl. Yanmar omitted engine zincs. What have you done with your Yanmar 4 to combat galvanic corrosion?


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Old 24-11-2015, 19:17   #2
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Re: Yanmar Zinc

Nothing in a 4JH3E and the oil cooler dies after 8 years or so (sailing 6 months a year).
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Old 24-11-2015, 19:52   #3
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Re: Yanmar Zinc

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Originally Posted by Vasco View Post
Nothing in a 4JH3E and the oil cooler dies after 8 years or so (sailing 6 months a year).
Yes but what are your habits re connection to shore power and resulting galvanic corrosion?

The question is really about why the smaller engines had zincs vs the 4 cyl.
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Old 24-11-2015, 20:05   #4
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Re: Yanmar Zinc

The freshwater cooled 3gm30f has no zinc as well. None in the block/head or the heat exchanger.

Seawater cooled version does however.

I'm guessing there are no seawater cooled 4 cylinder Yanmars. Not sure though.
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Old 24-11-2015, 20:05   #5
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Re: Yanmar Zinc

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Originally Posted by PuttingDoctor View Post
Yes but what are your habits re connection to shore power and resulting galvanic corrosion?

The question is really about why the smaller engines had zincs vs the 4 cyl.

Seldom if ever, the six months is spent cruising.

Sorry misunderstood the question. By the way, I've had 2 3GM30f's and neither had a zinc.
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