A well-maintained lawn mower is easier to operate and will last longer.
Step 4: Remove the old blade. Use a box wrench to loosen and remove the bolt that secures the old blade. Mark the bottom of the blade with an "X" to help when installing the new blade. Remove the old blade and the wooden block. Use a box wrench to loosen the bolt.
Do not attempt to service a running lawn mower. Refer to the owner's manual for specific instructions and safety warnings. Be sure to wear heavy gloves when handling mower blades.
