I recently bought a siezed 2 speed off of ebay. It was only seized because of a small bit of corrosion on the crankshaft, which was easily solved. Once I got the engine to turn, I noticed it turned very unsmoothly. I opened it up and noticed that the bearings behind the oil pump drive were completely shot. I can't figure out how to pull the oil pump drive off of the crankshaft. I don't have access to the very special puller described in the repair manual. Can anyone help?