FWIW, it's a PITA to get to the coil; practically requires disassembling the middle of the mower.  If I ever have to do mine again, I'm cutting the fan shroud in half and then reattaching it with tabs  Anyone know a shortcut I didn't see to get the coil in and out?
What made it worse is there was nothing wrong with the coil other than rust and dirt.  After I cleaned the surface of the flywheel and the coil surface and adjusted the gap, it's been running fine for five years now.
I see more problems on Cubs from corroded and dirty wiring connections than from failed components.  Just yesterday, mowing along and the mower deck belt drive clutch disengages and won't re-engage.  Several years ago, I had to toss the original deck on-off switch because it was always causing problems, having to be replaced every couple of years.  I rewired that circuit and a weatherproof switch with fewer wires, so I just traced them and it was the wire from the original ignition switch to the new deck switch which had gotten a bit corroded at the ignition switch.  Easy fix, but not one every owner would have been able to do.
jack vines