Here's whats I found in the manual for timing the mag. Hope this is readable and of some help.
I had an odd situation with one of mine. The mag had great spark on all cylinders then it kind of run on gas but mostly just puff some black smoke. To make a really, really long story shorter I found out a couple spark plugs were not as warm as the others trying to start it. I borrowed one of those spark testers that you thread the spark plug into and apply a little air pressure to simulate firing under compression. As soon as I applied a little air it immediately quit firing. Ended up being a bad condenser in the mag. Replaced it and it runs like a top still after three years now. Probably not your issue. Check the timing first and see what it does. Good luck!!
The picture is to reference the crank pulley timing marks.