Thanks! And I assume that's to better cope with the thicker fuel?
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Yes. There's definitely more to it than that, but basically, yes.
And by mechanically injected, what do you mean? I'm brand new to diesels let alone WMO. Their mechanics are a bit different than what I'm used to working on
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Mechanically injected usually means indirect injection. There is a gear driven pump which moves fuel to the injectors via steel injector lines. The pressure builds up enough, it collapses an injector spring and runs fuel past the nozzle and sprays on a pre-cup. The fuel is heated and further vaporized after bouncing off the pre-cup and the vapor flows into the chamber to be burned. The only electronics really needed are the starter and the fuel shutoff.
This is very different from today's diesels which are injected at insanely high pressures directly into the combustion chambers via electric pumps and injectors.
IDI (mechanical) diesels will be easier to find in the 80's-90's era, but we just bought a brand new Perkins power unit for a generator at work. It's an IDI, so the age thing is kind of a myth.
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