You're lucky it runs at all. The coil won't burn out- - - -it will just have a very weak spark. There's too much resistance in the primary coil winding to flow enough current to induce a good high voltage spark. Buy the right coil- - - -don't send a boy to do a man's job!
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
Love your enemies and drive 'em nuts!