when an orange box goes bad

Yep got a spark...and it does start back up, so I don't think anything is getting hot. relpaced coil and ballast already. I thinking a grounding issue since it is so intermittent. Gonna clean out the inline fuel filter and little brass catch filter at the carb to rule that out.

Any other thoughts??? I'm stumped but that aint hard to acheive

thanks in advance for any additional ideas.

Steve