I have acquired a B&S 8 HP horizontal motor that had a bad coil (spark plug wire had been chewed off by mice). I had another coil from a similar 8 HP motor that I installed. I have gaped the flywheel at .008 but still I get know spark. I looked to see if the coil was on backward, but it is not marked as to what side is out as the old one was. I know the coil is good as it ran on on the original motor. Any ideas??