Right idea - wrong tool! You need the proper Briggs puller whch screws into holes in the flywheel hub. If you persist with your puller, you will damage the starter ring gear.
You could use the 'lever under the rim and hit the crank' method - it works for me - but with the larger engines I would have to say 'at your own risk'.
phil_saunders@bigfoot.com
Phil Saunders, September 2008