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Please be very careful trying to remove the flywheel. Ideally, you should use the OMC puller kit, but I’m sure you don’t have one. DO NOT use jaw pullers, or you will damage the flywheel. The harmonic puller will probably work OK on this small flywheel, but be careful about the bolts you use. Weak bolts will break off in the flywheel, or pieces could break off hitting you in the face. Have you removed the flywheel nut? Use an electric impact gun to remove it. In any event, don’t put too much force/pressure on that harmonic puller, or something will break.
You mentioned that the powerhead is freed up now, but the throttle is still stuck, so my original theory isn’t the case. Nonetheless, the flywheel will have to come off to Replace the coils and service the ignition. The throttle linkage is probably jammed up, could be the friction bushing inside the white twist grip throttle control. You will figure that out once the flywheel is off.