This instructable will lead you step by step to sharpen a lawn mower blade. It is important to keep your blade sharp, for it decreases the time spent mowing as well as helps with overall lawn care. A dull blade will rip the tops off your grass, leaving it vulnerable to disease, while a sharp blade provides a clean cut that helps the plant recover quickly. Depending on the tools you use and how bad the blade is, this can be done in anywhere from 15 to 40 minutes. Sharpening is a simple task, even for a novice. It may take a few times to master however. Yet by doing this by yourself, you will reduce the time to cut your yard, while providing a better cut, as well as keeping your total maintenance cost down.
Step 1: Gather Materials
These are some materials you may need for this project. Because there are various ways to accomplish this project with different tools read carefully.
• Clamp (If using a grinder this may not be needed.)
Table Clamp OR C-Clamp
• Safety Glasses (Really only necessary if using grinder.)
• Ratchet (Or some kind of wrench)
• Screwdriver (Or something to clean the blade.)
• Bolt & Nut (Optional)
• Leather Gloves
• Block of Wood
The file and grinder are not both required. Can be done with one or the other, or both.
Step 2: Get to the Blade
The first step to gain access to the mower's blade.
1. Remove or disconnect the spark plug.
Warning: There is a chance the motor is at the top of its compression stroke and with a little bump could turn over causing the blade to spin under power.
2. Locate the carburetor
The throttle cables run to it. Another reference may be the primer, or little bulb, that you push before you start your mower.
3. Turn the mower on its side with the carburetor up.
Caution: Gas cap could have an air hole in it so you may leak gas.