For the sake of imagination, think of the flywheel as an upside-down cake pan, with magnets inside the side, As it rotates, the magnets pass by the coil laminations, where you see the burn marks. The magnets are not supposed to touch the laminations, only pass by with around 010″ clearance. The coils can slide in or out by loosening the three screws that hold them down.
Flywheel removal requires a proper puller and reinstallation requires a torque wrench to tighten the nut to 60-65 foot/pounds.