Hi - I'm new to this site. I think I need professional help. Lol! I have a 72 Merc, 20 horse with thunderbolt ignition. I have replaced low and high speed coils, capacitor, phasemaker points, bought a used ignition module on ebay - still no spark. Checked all wiring - it all seems okay. My local Merc dealer told me that in 30 years he's never seen a module go bad. The only thing I haven't replaced are the secondary coils. They test out okay. Any suggestions would be greatly appreciated.
Thanks,
musebass
Thanks,
musebass