Getting the most buzz for the buck demands that you understand the entire ignition system, and more people own a vibrator than you'd ever think. (You yourself have probably used one, although you may not have realized it at the time.) Vibrators—starting vibrators for aircraft engines, are in very widespread use indeed. Which means you ought to know something about how they work, what they do, and what their breakdown modes are, even if your present aircraft is of the "impulsive" or impulse coupling variety, which does not use a vibrator.
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