My 9.5hp was running fine and suddenly went on one piston. I figured out the bottom one was working and not the top. Took the flywheel off, checked both coils with a multimeter and they we're both the same and within range, points we're good and set at 0.02. Did a continuity test on the spark plug wire with the cap on and looked fine. Switched the top coil with one I knew worked and still no spark. Switched spark plugs, still no spark. What the hell is wrong?? What am I missing here, any help is appreciated.