Yeah I see where you're coming from Tiger.
This is for a friend and I told him I'd do what I could. But I'm not making much head way with it... I finally found my briggs spark tester....it was next to the snake.... spark stays consistent and only stops when the engine stops turning, doesn't appear to be killing it.
But with the compression reading, accurate or not, and the amount of air I had coming into the crankcase during the leak down test I'm confident it's a low compression/wore out engine...didn't look the oil had been ever changed in it. Black...black..