Chainsaw Repair

I have a Husky T435 that has had starting issues. First I replaced the plug, and it worked great for a while. It died suddenly on the job the other day, and now it's lifeless. It produces no spark. When I disconnect the kill switch wiring from the ignition coil and crank the fly wheel with the plug out of the crank case, the plug will arc back to the crank case, but will not produce any spark in the plug's own gap. I've tried a new plug, and adjusting the gap in the plug with no affect. I've also tried adjusting the gap between the ignition coil and the fly wheel. What is my pea-brain missing here?

Thanks

Check the plug wire to see that it is NOT **** and grounding out on the cylinder or other metal. Also check to make sure the coil has a good ground.