How can I safely raise mower up to change blades?

To raise you use floor jack and jack stands. It is just about as easy and far more safe to remove deck to change blades. Good Luck

You May Also Use "car Ramps" To Pull The Mower Up Onto. Be Sure To Lock The Brake, And Chock The Wheels Though. But Esquire Is Right , You Can Be Safer By Just Removing The Deck And Flipping It Over, However, This Means You Will Have To Remove The Belt As Well From Either The Deck Pulleys Or The Pto Shaft Pulley.