I have a 1974 mercury 650 outboard with thunderbolt ignition and it has no fire. I looked at the ignition coil and its cracked in several spots all the way through and the plastic is to. i was wondering if ti should still be able to get a spark or is the coil bad and wont create a spark. Is the folling good for cold starting compression: 125, 135, 135 psi. thanks
