One of the most easiest I can think of is to take a scrap block of wood and wedge it between the the blade and the the deck shell.
There is some good tips in this article ;
http://www.mylawnmowerforum.com/for...r-repair/1569-lawnmower-blade-sharpening.html
Something else I would do is put some never seize, the same stuff you put on spark plugs, on the bolt for the blade to make it easier the next time you want to take it off.
For safety sakes, remove the spark plug wire!
There is some good tips in this article ;
http://www.mylawnmowerforum.com/for...r-repair/1569-lawnmower-blade-sharpening.html
Something else I would do is put some never seize, the same stuff you put on spark plugs, on the bolt for the blade to make it easier the next time you want to take it off.
For safety sakes, remove the spark plug wire!