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Re: Re: Re: Confused on coil
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Posted by ltf in nc on December 07, 1999 at 16:35:21 from (206.228.213.101):
In Reply to: Re: Re: Confused on coil posted by MikeH(Tx) on December 07, 1999 at 13:45:14:
Mike H.,
As per your statement.... Inside the coil are two windings of wire, with a common ground. Nothing is
polarity sensitive. A direction the electrons are flowing across the sparkplugs
doesn't matter to the gasoline. This is nearly correct. The common is the primary transformer terminal which is connected to the switch (hot). Yes, it is polarity sensitive. The coil is arranged so that the high voltage is a higher negative in respect to the chassis. The center of the plug is hotter than the threaded outer part and the electron flow is from the center electrode which is the better emitter of electrons. As for your second statement...
The reason to mark one plus and one minus is to make sure the common side gets
grounded by the points. If the coil were installed backward, then the high voltage
winding and the low voltage winding would be in series when the spark occurred
and would lessen the spark voltage with extra resistance of the low voltage
winding (only a little lessened)....The answer is.... If the coil is installed backward the plugs are harder to fire and misfiring is more likely. Your final paragraph is correct in that the primary and the secondary terminals should be recognized and that the + and the - are markings are for this and not for polarity. Gotta run for now.
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