Update!
Put a timing light on it and when on the bottom sparkplug wire I can see both 1 and 2 timing marks sporadically.
When on the top sparkplug I consistently see only one timing mark.
Would this explain my problem of misfiring? What is the cause?
I have a Johnson J20CRERC serial #G03590918 that is misfiring at slower speeds. I have 120 psi compression in both cylinders.
I'm new to this forum, I can attach a short video if its possible in the forum?
