If you have everyhting off and just need the flywheel off it actually pretty easy. Position the engine so the front part of the engine is pointing to the ground and where the starter should be is pointing in the air. Then take a screw driver, the handle part and tap the flywheel, hit the flywheel on the back so that the flywheel will fall towards to ground when hit. It may take a good tap to get ot off, but dont be afraid to do this it wont break. Now be sensible and dont hit it as absolutely as hard as possible, but give it a good little wack and it should pop off.

The handle of a screw driver should be more then enough to get the flywheel off.