there really isn't any test for the coil, it either sparks or doesn't. when you put it back on, rotate the flywheel till the magnet is under the coil mount tabs. lay a 3/5 index card (they are about .035) on the magnet, then set the coil in place. don't push down on the coil, just let the magnet pull it down. snug up the bolts, and rotate the flywheel by hand while tugging on the index card to pull it out.
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