Hi Jared, I think you are talking about the coil, the single wire is the kill switch wire. If you can spin the motor over while holding the plug steel section onto the motor and see if you get any spark. If not try a bit if rod inside the plug cap and repeat the spinning procedure and see if you get a spark jump onto the head, if no spark you then have to look at the coil. You will need to undo it and make sure the surfaces where it bolts on are clean, then reset the air gap on it with the flywheel turned around so that the magnets on the flywheel grab the legs on the coil, pull one leg away from the magnet and put a feeler gauge (stanley knife blade will be good enough for this test) then do the same with the other leg and then you can tighten the coil holding studs up. remove the feeler gauges and then you can repeat the earlier tests regarding the spinning the motor with a bit of rod sticking out of the plug cap. Make sure the kill switch wire is not touching the motor as this will kill the spark.After spinning it with the rod out of the plug cap and you have no sign of spark you will need to find another coil. You may find this was the reason this whole mower was pulled apart in the first place because it wouldn't run. People do strange things at times
