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Old 21-09-2016, 20:00   #16
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Re: White Smoke and we already have a Pope


The white (grey depending on your visual acuity) is straight unburnt diesel from cyl 1. Loosening the injector line on cyl 1 with no change in running smoothness showed cyl 1 is not firing. Fixing the faulty injector will solve the problem.

Charlie, please let us know when the new injector is in.

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Old 21-09-2016, 20:18   #17
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Re: White Smoke and we already have a Pope

Make sure water intake filter is clear. It could just be overheating. Same thing, same story happened on my Yanmar 3YM20.

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Old 19-10-2016, 09:03   #18
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Re: White Smoke and we already have a Pope

Can't believe it has taken me this long to get to the boat and work on it. Life gets in the way. ( Well two weeks in Europe)

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Above is a picture of my heat exchanger. The impeller looked fine until I removed it. The fins that had broken apart were not visible without removing the impeller. Also I cleaned out the tubes with a brass brush I bought from Harbor Freight. They had closed somewhat though I can't quantify how much. I assume that this is what caused the white smoke. I am awaiting "O" rings from Yanmar and then I will put it back together and see if this has resolved the problem.
Fair Winds,


Between us there was, as I have already said somewhere, the bond of the sea. Besides holding our hearts together through long periods of separation, it had the effect of making us tolerant of each other's yarns -- and even convictions. Heart of Darkness
Joseph Conrad
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Old 19-10-2016, 11:56   #19
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Re: White Smoke and we already have a Pope

This seems to be a common problem!
I really think there should be a strainer between the pump and the heat exchanger. Even if the impeller is inspected or replaced on a schedule, all it takes is one over heating from a closed valve or a plastic bag over the inlet, to burn the impeller enough to crack/burn the rubber.

Normally inspections are every 250 hours, and replacement at 1000 hours, or 1 year. And winterizing here in the PNW its common to remove the impeller and spray it down with silicon, if its fairly new, and replace in the spring. Carrying a couple spares is a good idea, too.

Faithful are the Wounds of a Friend, but the Kisses of the Enemy are Deceitful!
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