The Toro lawn mower uses inner and outer clips to help stabilize the blade and secure it to the mower. Removing the Toro lawn mower blade will require removing both of these clips. When you remove the blade, it is a good idea to clean around the mower engine shaft where the blade mounts. Inspect the inner and outer clips for damage, and replace them if necessary when replacing the mower blade.
Place the Toro mower on a level surface and pull the plug wire from the spark plug. Grab the plug wire where it fits over the spark plug and pull the wire off the plug with your fingers. Hook the wire around the retaining post near the plug. Put on the leather work gloves to protect your hands from the sharp edges of the old and new mower blades.
Tilt the Toro lawn mower on its side with the air filter pointing toward the sky. Wedge the piece of wood between the mower blade and the bottom of the mower deck to prevent the blade from turning while you remove the retaining bolt.
Grab one end of the blade between the cutting edge and the mounting bolt with a gloved hand. Remove the mounting bolt in the center of the blade with a socket wrench.
Remove the mounting clip that covers the center of the blade and pull the blade off the engine shaft. Remove the inner clip from the engine shaft if the clip does not come off with the blade.