Tom,
If the engine was running and you stopped it, it's unlikely that it
threw a rod, that would almost certainly stop it instantly and
destructively. The white smoke could indicate a blown head gasket
allowing coolant to enter the cylinders or some issue with the valves.
Does it still turn over with a hand crank or the starter? One of the
best diagnostics is a compression test on each cylinder (is it a single
cylinder?). If there are no marine mechanics around, most likely a
truck mechanic could assist if you can find one willing. You do not have
to pull the engine, assuming you can get at the top of the cylinders to
remove the injectors. However any significant repairs is most likely
going to require pulling the engine. (I pulled my Atomic 4 out by using
the main halyard and the boom, not that hard to do.)
Neil Gallagher
Weatherly, 35-1
Glen Cove, NY
On 7/19/2024 7:23 AM, T Smyth via CnC-List wrote:
A few weeks ago I was returning to the dock and my Perkins diesel
began knocking quite a bit. I slowed it down and the knowing subsided
but then became louder with an excessive amount of white smoke
emerging from the exhaust. I stopped the engine with just enough
thrust to navigate to my slip.
I am not a diesel mechanic but it could be a thrown rod. The engine
has less than 100 hours on it but it perhaps around 10-15 years old.
As with most auxiliary power, it doesn’t get used much in my lake setting.
Question: 1. What might the problem be?
Where does one find a diesel mechanic who can work on a small boat engine?
Must the engine be pulled to make such repairs?
1974 C&C 30 MK1
Thanks for any ideas.
Tom
Augusta Georgia USA
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