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Old 18-06-2016, 10:09   #1
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What's in Discharge?

I have a Yanmar 4JH3-e, 600hr's, haven't run her hard in a couple of months. I start her weekly to operating temp. today the water is calm at the marina and I noticed a trail of what I think is carbon on the water. It has no color and when I run a white cloth through the water the cloth comes out clean. just wondering what it is??
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Old 18-06-2016, 18:44   #2
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Re: What's in Discharge?

Probably soot out of the exhaust manifold. Diesels with dry exhaust stacks often leave soot specks on deck.
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