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ENGINES
Should my diesel be steaming?
Q I have a Yanmar 3HM in my Colvic Countess 35. Both boat and engine were an abandoned project (all unused) from the 1980s which I bought in 2011 and completed about three years ago. I installed the engine and shaft and got the final alignment and fitting completed by a marine engineering company in Ipswich. As the engine was fitted below the waterline they installed a custom high rise mixing elbow.
When I operate the engine at higher revs I get a lot of steam from the exhaust. How much? To the extent that I have been pursued by a local fishing boat to warn me! But it’s definitely steam.
There is plenty of water coming through (I have replaced the water pump) and no part of the exhaust system or engine seems to be
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