How To Remove A Lawn Mower Blade

Removing a lawn mower blade may seem like a daunting task, but it’s actually quite simple. Whether you’re replacing the blade or just sharpening it, here’s a step-by-step guide on how to remove a lawn mower blade.

Step 1: Safety First

Before you begin, it’s important to make sure you’re taking the necessary safety precautions. Turn off the lawn mower and disconnect the spark plug wire to prevent accidental start-up. Wear gloves to protect your hands and eye protection to prevent any debris from getting in your eyes.

Step 2: Position the Lawn Mower

Place the lawn mower on a level surface and tilt it back so that you can access the blade. Make sure the fuel tank is empty or nearly empty to reduce the weight of the lawn mower.

Step 3: Remove the Nut

Using a wrench or socket, loosen the nut that holds the blade in place. Turn the nut counterclockwise to remove it. Some lawn mowers may have a bolt instead of a nut, so make sure you have the correct tool for your specific model.

Step 4: Remove the Blade

Once the nut is removed, you can slide the blade off the spindle. If the blade is stuck, you can use a rubber mallet to tap it loose. Be careful not to damage the spindle or the blade when removing it.

Step 5: Inspect the Blade

Take this opportunity to inspect the blade for any signs of damage or wear. If the blade is damaged or dull, it’s best to replace it rather than sharpening it.

Step 6: Sharpen the Blade (optional)

If the blade is dull but not damaged, you can sharpen it using a file or grinder. Be sure to follow the manufacturer’s instructions for sharpening the blade and wear eye protection.

Step 7: Reinstall the Blade

Once the blade is sharpened or replaced, slide it back onto the spindle and tighten the nut or bolt. Make sure the blade is securely attached before starting the lawn mower.


How often should I remove and sharpen the lawn mower blade?

It’s recommended to sharpen or replace the lawn mower blade at least once a season, or more often if you have a large lawn or frequently mow over rough terrain.

What size wrench or socket do I need to remove the nut?

The size of the wrench or socket you need will depend on the size of the nut on your specific model. Check the owner’s manual or contact the manufacturer for the correct size.

What should I do if the blade won’t come off?

If the blade is stuck, you can use a rubber mallet to tap it loose. If it still won’t come off, you may need to use a penetrating oil to loosen it. Be careful not to damage the spindle or the blade when trying to remove it.


Removing a lawn mower blade is a simple process that can be done in just a few steps. By following these instructions and taking the necessary safety precautions, you can easily remove and replace your lawn mower blade to keep your lawn looking its best.