Greenworks Lawn Mower Blade

This blade is designed specifically for Greenworks 21-inch deck mowers. It is confirmed to fit models MO40L4413, MO40L03, and MO48L4422. Always check your mower's manual or the model number sticker on the deck to ensure a perfect match before purchasing.

No, this listing is for the replacement blade only. You will need to reuse the existing bolt and washer assembly from your current mower blade during installation.

This blade is engineered specifically for Greenworks equipment. While other 21-inch mowers may have similar dimensions, the mounting hole pattern and blade shape are often proprietary, so we do not recommend using this on non-Greenworks mowers.

Generally, you should replace your blade once every season or sooner if you notice the tips of your grass looking frayed or brown after mowing. A dull blade tears the grass rather than cutting it cleanly, which can stress your lawn.

Yes, you can sharpen the blade if it is still structurally sound and free of deep nicks or bends. However, if the metal has become thin from repeated sharpening or is significantly damaged, replacing it with this genuine part is the safer and more effective option.