I still say there is a grounding problem at one of those cables. I’ll ponder and think about it awhile.
EDIT: OK, I pondered. Gotta be a problem with that bonding cable between the powerhead and tray. Or I’m fooled.
EDIT, EDIT: Rats, I’m still pondering. Sparking at the base of the starter??? I can’t think of a reasonable excuse for that. This calls for some voltage drop tests or disconnecting one devise at a time (choke, starter).
