[tortuga]

Removed the entire exhaust on the captains side and discovered a (now) obvious exhaust leak Between the top of the header flange and the head not really visible with the header on…Still doesn't explain the spark.

I DID just have a system ground problem though, (the battery ground wire was actually cracked clear through, amazed it ran at all)…

I installed a new stout engine ground along with battery ground.
Things i checked
#7 compression
#7 valve spring on the seat force
#7 topside valve gear inpect -rockers push rods

I put it all together and ran it and used the stethiscope no internal noise…

Back to exhaust leak…

Why i was sseing arcing is still a mystery, UNLESS the leak would blow the boot off? Dunno