Hi,
Norm I used a bearing puller. It was just thin enough to fit in between the boss and the flywheel. I think I just need an anvil or something very solid to hit against. Railway iron or similar. Can not believe how much people want for a decent anvil.
Paul, you must have moved the flywheel a little to cause that issue. They only clear by 20 thou or so so not much needed. If its loose at all do not run the engine at all or you might damage the flywheel where it fits over the crankshaft. I have done that once.
That boss must be off a self propelled mower hence the pulley. Can not change the boss anyway unless you can get another one with a pulley which will not be easy. I wonder if thats what the factory Super 24 Powertorque pulley is like.
All the best
Jeff