The Op didn't know about proper blade engagement and disengagement, now he does. It doesn't really have anything to do with the coil, but it can be a domino affect. When you start to stress one part of a machine, it then stresses another, and another.
Everything has been cleared up. Jeff had given good advice to begin with.
There is an Old Blue Chair for each and every one of us, we just have to find it.
2006 GMC Sierra 2500hd crew cab
BOSS 8'2" Power V
Hustler X-one 60"
Toro Proline 36" wb w/t-bar controls
JS46 22" walk-behind (wouldn't recommend)
Shindaiwa T254, Echo trimmers, chainsaws, pole hedge trimmer, pole saw, hedge trimmer
Shindaiwa 633 and Husqvarna 130BT blower