I don't have one of those, but looking at an IPL, pull starter cover, unscrew coil mount screws, detach spark lead and stop switch ground, reinstall, set gap, tighten screws down. I guess most guys use a business card to set the ignition module (coil) to the flywheel magnet gap. Pretty easy job looks to be. proly pull the top cover as well for the spark lead routing.
Good idea to pull that little ground wire first, eliminate the switch as a check to make sure that isn't the problem. Check that wire for breaks, etc, so it isn't grounding out. with the wire off and tucked out of the way, maybe throw a piece of electrical tape over it, put the cover back on, spark plug out, put it into the plug boot, layed against the cylinder plug opening so you can see it and it has a plug ground, pull cord (it will be easy with the plug out), look for spark. Also try a known good plug.
I just went through this this afternoon with a husky brush cutter. It most definitely needs a new module. Back under the bench for that guy until the parts fairy shows up...
