Join Date: Jun 2011
Location: somewhere south of civilization
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Re: Bukh DV10 Slow Throttle & Black Exhaust smoke
Over-fueling is the primary cause of black smoke from the exhaust of a heavy duty diesel engine. Over-fueling can be caused by diesel fuel injector wear that enlarges the nozzle hole or erodes the injector needle and allows excess fuel to flow into the combustion chamber.
I think you probably had an injector fail. Not the cheapest fix, but at least its not a lot of work to pull and replace injectors. Pull them all and send them to a shop that specializes in them. Ask a big rig repair shop for the name of a shop and stay away from the 'marine' scene and save some money.
"Any idiot can make a boat go; it takes a sailor to stop one." Spike Africa aboard the schooner Wanderer in Sausalito, Ca. 1964.
“Believe me, my young friend, there is nothing - absolutely nothing - half so much worth doing as simply messing about in boats.” ― Kenneth Grahame, The Wind in the Willows
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