How To Replace Lawn Mower Blade

How to Replace Lawn Mower Blade

If you own a lawn mower, you know that after some time, the blades will become dull and will need to be replaced. In this article, we will show you how to replace lawn mower blade in easy, step-by-step instructions.

Step 1: Safety First!

Before you start replacing the lawn mower blade, make sure you take all necessary safety precautions. Turn off the lawn mower and unplug it from the power source. Wear gloves and protective eyewear to protect your hands and eyes.

Step 2: Remove the Old Blade

Locate the blade on your lawn mower. Use a wrench or socket to remove the bolt that holds the blade in place. Make sure to keep track of the bolt and any washers that come off with it.

Step 3: Inspect the Blade

Before you install the new blade, take a close look at the old blade. If it’s damaged or cracked, it’s time to replace it. If the blade is only dull, you can sharpen it yourself or take it to a professional.

Step 4: Install the New Blade

Place the new blade onto the lawn mower, making sure that it’s facing in the right direction. Replace the bolt and any washers that came off with it. Use a torque wrench to tighten the bolt to the manufacturer’s specifications.

Step 5: Test the Blade

Once you’ve installed the new blade, start up the lawn mower and test the blade to make sure it’s working properly. If you notice any problems, turn off the lawn mower and double check your work.


Q: How often do I need to replace my lawn mower blade?

A: It depends on how often you use your lawn mower and the condition of your lawn. As a general rule, you should replace your lawn mower blade at least once a year.

Q: Can I sharpen my lawn mower blade myself?

A: Yes, you can sharpen your lawn mower blade yourself if it’s only dull. You can use a sharpening stone or a bench grinder to sharpen the blade. If the blade is damaged or cracked, it’s best to replace it.

Q: Do I need to balance my lawn mower blade?

A: Yes, it’s important to balance your lawn mower blade after you’ve installed a new one. An unbalanced blade can cause damage to your lawn mower and make mowing your lawn more difficult.


Replacing a lawn mower blade is a simple task that can be done by anyone with the right tools and a little bit of know-how. By following these easy steps, you can replace your lawn mower blade and get back to mowing your lawn in no time.