Basic care and maintenance of a lawn mower requires you to sharpen the blade on a regular basis. Pieces of gravel, wood and other debris laying in the yard can create large dents and gouges in the blade of your mower. The most common indicator that a blade needs sharpening is when the grass looks uneven when cut or when the blade causes the mower to shake when running. Sharpening the blade is not overly technical and can save you money in the long run.
Put on some heavy-duty leather gloves and safety glasses to protect yourself from debris.
Squirt a lubricating oil onto the blade bolt to remove the bolt and nut off the mower. Let the oil stand for a few minutes to let it penetrate fully.
Remove the fuel and oil from the mower before tilting it over to access the blade. Tilt the mower so that the carburetor is above the fuel tank, which prevents fuel from getting into the carburetor.
Block the blade at the bottom of the mower deck with a spare piece of wood to keep the blade from moving while removing it to keep you from cutting yourself.
Place your wrench on the nut holding the blade in place, and turn to the left to remove it. Hit the wrench lightly with a rubber mallet if it does not turn.
Look at the angle of your mower blade to ensure you know exactly how the angle is supposed to look.
Use a secured metal grinder to sharpen the blade. Run the blade against the grinder slowly, back and forth, following the shape of the blade.
Sharpen the blade until there are no visible nicks. Use a metal file to even out the blade.