OK, well, make sure that's the right tool as well... Is your engine B&S or Tecumseh? To use that tool, you take the nut securing the flywheel off and screw the tool down in it's place. It should NOT touch the flywheel but leave a small gap.

Take a big screwdriver and place it in between the engine block and the flywheel, ensuring that you're not prying against any wires or the magneto, etc... When you pry up with it, you should see the flywheel move upwards slightly. It's important to see this upward motion because if you don't, you'll be hammering against the bearings and that's not good...

With it held upwards with the screwdriver, gently tap the flywheel tool with a hammer and the flywheel will pop loose. Then unscrew the tool and remove the flywheel.

__________________
-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250