Sharpening a dull lawn mower blade will save you the trouble and money of buying a new one and cut your grass more effectively.
Step 4: Remove the blade. Wearing gloves to protect your hands, loosen the bolt with a wrench. Remove the bolt, the washer and the blade. Remove the bolt, washer and blade.
Be sure to disconnect the spark plug wire from the mower spark plug before attempting to remove the mower blade. Wear safety glasses and gloves when sharpening the mower blade. After sharpening your blade and putting the mower back into use, regularly check that the nut securing the blade is tight.