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"G.R. Patterson III" wrote:

Lisa Hughes wrote:

Not really. Touching a spark plug could feel pretty bad.

Spark plugs run on extremely high voltage. The 12v battery power is fed through
a step-up tranformer (known as a "coil" on most systems) to increase the voltage.
Voltage at the plug will be anywhere from 40,000 to 100,000 volts.

Uh, yes. That's why I said it could feel pretty bad and juxtaposed it with the
relatively harmless 42 volts. BTW: that spark plug can knock you into last week, but
it has very few amperage and will not likely cause you any long term harm (unless you
bang your head as you back away fast