How to Sharpen Lawn Mower Blades without Removing Them?

How to sharpen lawn mower blades without removing? One of the essential gardening tools you can use to maintain your garden or yard’s neat appearance is a lawnmower. But, for this tool to be efficient, you need to sharpen the blades. So, if you want the grass to be perfectly trimmed, make sure to sharpen the blades when they become dull.

There are two options to choose from when it comes to having well-sharpened lawnmower blades. The most popular method and preferred by many is to remove the edges first before sharpening them.

But in this article, you will learn about how to sharpen the blades without removing them. It may not be as popular and effective as the first option, but you can do it.

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Steps to Sharpen Lawn Mower Blades Without Removing

tools and safety gear for sharpening your lawnmower

Before you start, make sure to prepare the tools and safety gear for sharpening your lawnmower’s blades. Check them out below.

  • Flat file or grinder
  • Gloves
  • Wire brush or steel wool
  • Goggles
  • Woodblocks

After preparing all the above tools and gear, the next step for you to follow every single step without missing any. The following steps will guide you to have well-sharpened blades.

  • Unplug the Power Cord
    Unplug the Power CordPrioritize your safety before anything else. So, to avoid an accident or injury, make sure to unplug the power cord before you proceed to sharpen the blades. Then, find a flat surface where you can place the mower.

  • Seal the Fuel Tank and Tilt the Machine
    Seal the Fuel Tank and Tilt the Machine Remove the fuel tank’s lid, and seal its mouth using a plastic bag to ensure the gas will not leak. Close it up again by replacing the cover. But, if the fuel tank is empty, you can skip this step and proceed to the next.

    The lawnmower should be on its side for you to access the blades. Check and ensure that the fuel tank and carburetor are facing upwards. Now, use the wooden block to keep the lawnmower stable. Place it diagonally at the mower’s other side

  • Clean the Blades Thoroughly and secure them
    Clean the Blades Thoroughly and secure them Use a wire brush or a steel wool to remove rust from the blades’ surface. You may also clean beneath the mower deck. After cleaning them thoroughly, you can start working on the edges until you could restore their sharpness.

    Place another piece of a wooden block diagonally under the blades to secure and prevent them from moving. If they move even a bit, you will find it uncomfortable when you try to sharpen them. You can also hold the back of the blade with your left hand to prevent it from moving when you start working on it.

  • Sharpen the Blades
    Sharpen the Blades Now, grab the flat file or grinder on its handle to start sharpening the blades. Place it over the blade’s cutting edge and start from the center. Make sure to put some pressure while trying to sharpen the blade.

    When you finish sharpening one side, grab the other side, and do the same. Always maintain the right angle while working on them. Note that you don’t have to run your finger across the blades to check if they are already sharp. When the cutting edge gets shiny, then that’s a sign.

Tips to Follow Before and During the Sharpening Process

If you choose to sharpen your lawnmower’s blades on your own instead of bringing them to a repair shop, then the following tips will be your guide. It doesn’t matter whether you have experience or not when it comes to sharpening a mower’s blades.

  • Wear goggles and put your gloves on.
  • Keep the fuel tank empty before starting the sharpening process to prevent fuel leakage.
  • Always check the blades’ condition to know if they are a little bit dull or nicked and need sharpening or replacement.
  • Please make sure they are well-balanced, and you don’t hear any strange sound underneath the lawnmower deck.

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When Should You Sharpen the Lawnmower’s Blades?

If you regularly use your lawnmower, expect the blades to turn blunt sooner or later. But how would you know if they become dull and need sharpening? Additionally, how often should you sharpen the blades?

Are the tips of the grass look torn? If yes, inspect the blades to see if there are scratches and nicks. These are among the signs that tell you they need sharpening. And when it comes to how often you should do it, you must sharpen them at least once a year or as often as necessary.

If you don’t want to sharpen the blades often, make sure to clear the lawn from branches and stones. And see if other things may cause them to become dull. In case you have no time to sharpen the blades, make sure to keep an extra edge on hand, which is already sharp. Keep in mind you can use the blades for even more than a decade if you sharpen them regularly.

Why Should You Sharpen Your Lawn Mower’s Blades?

If you want to give your lawn a clean look, it is essential to use sharp blades. You don’t want the grass to turn brown, so once you notice that they become dull, sharpen them first before you continue to mow the lawn.

Whatever model of lawn mower you have, you should keep its blades sharp. You can bring them to a repair shop or do it yourself. If you choose the latter, make sure to follow the steps on how to do it properly.


If you want to save time, you can sharpen the blades even without removing them from the lawnmower. The steps and tips mentioned above will guide you on how to do the process successfully.

Since lawnmowers are essential tools to keep your garden or front yard look clean, inspect and see if the blades are sharp. When you do it on your own, ensure you do it properly to avoid damaging the edges and replacing them in the end.

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