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I’ve never cranked the engine over with the key while priming, just use a drill and rotate by hand, you’d spin it too fast with the ignition I’d think
 

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So what happens when the engine is running? It's spinning a lot faster than it would by hand. This is an honest question, I'm not being a smart ass.
The purpose of priming is to assure that you have oil everywhere before you fire the engine, that the pump is full of oil and pumping and to coat surfaces with a film of oil, after this is done, you fire the engine and run as normal....You're comparing apples to oranges, after the engine has been run oil is already where it needs to be and you already know the pump is pumping and working.
 
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