How to Sharpen Lawn Mower Blades With a Stone


Keeping a lush green lawn can be a little bit of work. Lawns need adequate water and fertilizer to maintain their health. Also, proper lawn mowing techniques need to be followed to prevent the health of your lawn from going downhill. The worst thing you can do for your lawn is mow it with a dull lawn mower blade. Doing this will rip and shred your grass blades instead of cutting them off cleanly. Shredded ends will allow fungus and disease to enter your lawn easily. To prevent this, you can sharpen lawn mower blades with a stone. Sharpening lawn mower blades is a fairly easy process that requires a little time and not many tools.

Step 1

Bring your lawn mower to a level surface and disconnect the spark plug wire.

Step 2

Lay your lawn mower on its side and locate where the blade is attached to the engine shaft. There will be a single bolt at the fastening point.

Step 3

Remove the bolt with an adjustable wrench and set aside any washers that come off with it. Pull the blade off.

Step 4

Place the lawn mower blade in your table vice and tighten it down. Wet down your sharpening stone and rub it along the edge of your mower blade. Follow the natural curve of the blade and sharpen until you have a smooth, clean and sharp edge.

Step 5

Remove the lawn mower blade from the vice and hold it in the middle to check the balance of the blade. It should stay perfectly level if the blade is balanced correctly. If it leans one direction, put the blade back in the vice and remove a little more material from the side that tips downward.

Step 6

Reattach the blade back onto the lawn mower. Remember to put the washers back on in the same fashion that they came off.

Step 7

Set the lawn mower back upright and reattach the spark plug wire.

Tips and Warnings

  • Wear gloves when handling the lawn mower blade. The edges are extremely sharp and can cause serious injury to exposed skin.

Things You'll Need

  • Adjustable wrench
  • Table vice
  • Sharpening stone
  • Water
  • Gloves


  • Blain's Farm and Fleet: Sharpening a Lawn Mower Blade
  • Lawn Mowers and Garden Tractors: Mower Blades Sharpening
Keywords: sharpen lawn mower blades with a stone, engine shaft, adjustable wrench, table vice, sharpening stone, spark plug wire

About this Author

Robin Gonyo has been writing for several years now. She has a deep love for gardening and has spent a vast amount of time researching that subject. Previously she has written for private clients before joining Demand Studios. She hopes to share her knowledge with others through her writing.