Keep Your Mower Blade Sharp

Step 5 Position the motor and the guide

The flat part of the blade in the area of its mid-point will ride on the guide. Move the guide so its distance from the grinding wheel allows the blade to slide over the guide without riding up onto a curved section of the blade, and yet the full length of the sharpened portion of the blade can come into contact with the grinding wheel as the blade slides over the guide.