No. Wire heating problem is gone.
I've attached a picture of the inside lower half of the kill switch. Left side of the round disc that supports the brown and yellow/red kill switch wires show evidence of damage repair and partial remains of whatever substance was used to repair it. This repair substance had deteriorated and become powdery, apparently causing the short.
However.
There could be an alternative or additional cause or factor contributing to the kill switch short circuit.
For those of you who have yet to experience the joy of disassembling and reassembling these kill/run switches, they contain 3 tiny springs with a tiny ball bearing atop each one. Is it possible that after 44 years one of these little ball bearings deteriorated to the degree that its rust or flakes contaminated the switch internally, creating the short?
Or, did the previous party who repaired the broken disc not reassemble it correctly and one escaped its detent position, causing the short? Because I found only two when it came apart. But, they are tiny so it could have gotten away upon dissambly.
I'd suggest to anyone taking one of these apart, do it inside a plastic bag. if the springs or balls drop out they're contained in the bag.
Btw. These little ball bearings you can get at a good hardware store.