Remove the spark plug, place a business card under the module then rotate the flywheel until the coil is centered over the magnets. Tighten the screws, rotate the flywheel and remove the card. Re install the blower housing and spark plug.

Thanks Canguy.

I've pulled the spark plug but the flywheel won't rotate at all - it seems like it's locked somehow. Is there something else I need to remove to free it up?

If the mower deck and transmission drives are disengaged and it still won't turn, there is an internal problem.

Thanks Canguy! I loosened the belt for the mowing deck and got it swapped out.. My LX255 is running good as new again!! Thanks to your tip I probably saved a couple hundred bucks and a lot of hassle getting the old dog into the shop.