sure you getting power to coil when engine is cranking ? many times we hot wired boats to fire them at the boat yard . you can only run 12 volts threw the points for a very short time before you burn them up. but if you can crank the engine with the key . timing is good point gap .fuel . you run a jumper wire to the bat to the coil it will run if not then is condenser or points or points wire there a break in the wire