Originally Posted by herler
Actually it's a Hit-and-miss design and while it might run on an alternate fuel it also doesn't run long without maintenance.
The earlier designs required a mechanic ride along as the engine didn't have an oil sump so the mechanic had to spray oil on the valves as it ran, for obvious reasons valve covers were not used.
The smoke you see is from incomplete combustion, that's how inefficiently they ran.
This one gives a good idea as to some of the risks involved:
Hence the junior mechanic watch position of Oiler usually on ships. IC was still in its infancy. Hell, most diesels smoked into the 70s, especially the two stroke Detroit series.
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