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Smoke, sparks, fire & scary noises.
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Detroits will suck oil and keep stumbling even with the air intake blocked. I have seen them overspeed before, once in the tight confines of a bilge - pretty scary. It must be a two-stroke thing. <br /> <br />When I was going to school for diesel technology, in an injection class, I learned that the injectors are only putting out about five percent at high idle (maximum rpm,no load). This gives you a pretty good idea of how quickly an engine can possibly take off. It also gives you an idea of how important load testing is to really expose problems ( just because an engine is running at max rpm, is still at a fraction of load). <br /> <br />I think your average guy might be wondering what a meggar is. I know they are used for testing resistances of very high value. The ones that I have seen in the navy were very old and hand cranked.
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