Just wanted to wrap up this thread, I took boat out yesterday and ran very well… mostly putting around at low speed to fish/troll for a few hours. Fouling/noSpark issue on bottom cylinder gone. Think it’s slow speed is better than I’ve had it before. Tick tick tick about 1mph.
Mission accomplished. New cdi coil, new plug wires, new plugs, and points timed off marks with multimeter.