The coil gap does look a bit on the large side especially on the right hand side as viewed in the picture. I have Gilson Rotary Hoe sitting here that has a 5 HP with no spark but I hope to get it going replacing the coil with a later magneto type rather than the old points and condensor type when I can get my hands on one. Maybe something got jammed between the flywheel and the coil leg to snap the mount like that.