I had to remove the flywheel on my 3.5HP tecumseh mower, because the kill switch wasn't making contact. I read up about removing the flywheel and it seemed I really needed the tool. I didn't want to spend an arm and a leg for one, because I would only be using it this one time most likely, and there was nobody I knew that had one that would lend it to me, so I tried my way with making one.
I didn't want to spend allot, so a thick steel plate was out of question. I ended up using
-(2) 2X4 pieces cut short just to stack on top each other
-(3) 1/4" hex bolts and washers
-(1) 5/16 hex bolt and washer/nut that acts as the main puller
I layered the 2X4 on top each other, drilled the holes accordingly for the 1/4" bolts to fit through, and the centre push bolt to go through. Threaded them into the 3 openings on the flywheel and started to turn the main bolt with my ratchet. After a few turns I gave the flywheel a tap with my dead blow hammer and she popped off. I was surprised and excited as well. Fixed the switch with some Nu-Trol contact cleaner and she works great now.
Will post pics in a few.