Sharp lawn mower blades are needed to maintain a healthy lawn. If you've ever seen grass that has a "haze" of brown on top of the green, it is most likely caused by a dull lawn mower blade. This is because the dull blade shreds the grass tips rather than cutting them cleanly, which lets fungus and disease easily enter into your lawn. The first step to replacing your lawn mower blade is to remove the old one. Toro lawn mower blades are simple to remove and only require a few tools.
Pull the spark plug wire off of the spark plug so that the Toro lawn mower doesn't start while you are removing the blade.
Lay the lawn mower down on either side to look at the blade. A bolt is in the middle of the blade to hold it to the engine shaft.
Place the correct size box wrench or an adjustable wrench over the bolt, and turn it counterclockwise with one hand while holding the blade steady with your other gloved hand.
Remove the bolt, and set it aside with any washers that come off with it.
Pull the blade to remove it from the Toro lawn mower.