I rebuilt the flippers on a Fireball yesterday (new coils, plungers, pawls, bushings - the whole nine yards). The previous owner was clearly a DIY guy (probably before the internet) and went to town on this thing. I was wondering if anyone had a pic of the zipper flipper wiring. I have it wired up as per the schematic but can't seem to stop the chatter with the EOS gap unless I completely back it off the EOS actuator.

For the record: before the rebuild one chattered, now they both do. So I'm guessing I flubbed the wiring?

Thank you! I ran it for a week with no EOS. I'm shocked it took that long for someone to hold the flipper up until the coil burnt up.

I did! The previous owner had wired a coil up wrong. It took a very Bally trained set of eyes (Brian Saunders) to find that needle in a haystack. That Fireball has a new home now, though.

This one is my new enemy.

Turns out I hit the lottery with two bad coils. Windings must've been broken somewhere out of sight. All was good when I swapped them out.