More often than not the condensers go bad, and you can’t just replace them, due top the potting used, it is NASTY stuff. You can, by following our own "Tubs" videos on Youtube, find out how to replace the entire ignition, i.e. coil, and condenser using a Zephyr coil and a common condenser, the points are not in the tube.. The coil generally gets destroyed when removing the condenser.
OR, you can just contact, Doug Penn, as he has them already rebuilt, just connect and go…
http://www.richardsoutboardtools.com
classicomctools@gmail.com