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Message: <blockquote data-quote="loquin" data-source="post: 113329" data-attributes="member: 3177">This shouldn't be a probem, fetor.  IF the coil were some sort of secondary coil, where shorting it wouldn't kill the engine, then it WOULD be a problem.  The amount of current would cause the coil to eventually heat up & fry.However, when you short out the coil, the motor stops spinning in a few seconds.  There isn't enough time (or current) to cause the whole coil to heat up enough to cause any damage.  If 3 watts is the upper limit before the engine is affected, 6 watts should be enough to kill the engine.  So, we'll assume 10 watts.  Take a look at a 10 watt florescent bulb - place you hand around the bulb and base, and turn it on.  How long before your hand gets warm?  A minute?  5 minutes?  The amount of mass to heat up is about the same as a coil of wire.  Plus, the coil of wire is wrapped around a lump of laminated steel.  There's a LOT of mass there, and not much power to heat it up...</blockquote>