Coil failures are few and far between, but it's more likely that you might have a coil with the wrong resistance in the primary winding. Try measuring the resistance of the primary with both wires disconnected. A coil that will flow approximately 5 amps with 9.5 volts applied to it will have somewhere near 1.9-2 Ohms of resistance. 5 amps is the maximum a set of points will handle reliably without burning.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
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