A Simple Guide to Sharpening a Mulching Mower Blade

Cutting your grass can be a hassle in the summer because of the heat and humidity and large amounts of rain. Cutting your grass can also become more difficult if you do not have a sharpened blade on your mulching lawn mower. If you do not keep the mulching blade sharp then the grass is going to be uneven and not be as cut as you would like it to be in the mulching bag. To ensure that your mulching mower does what it is supposed to with ease, you need to sharpen the mulching blade at least once a season. Sharpening a mulching mower blade can be more difficult because the blade is curved and not straight like on a regular lawn mower. Here is a quick guide to help you sharpen your mulching mower blade to make sure your grass is cut evenly.
The first thing you want to do so you can sharpen your mulching mower blade is to disconnect the spark plug wire from the spark plug if you have a gas-powered lawn mower. An electric mulching mower just requires you to unplug it from an electrical outlet before you get started. If you have a lawn mower that is battery-powered then you need to read on how to disconnect the battery from the motor before proceeding.

You should grab your tools and materials you will need at this point which are piece of wood, bench vice, metal files and a long-handled wrench. The piece of wood can be anything you have around the house as long as it is similar to a wedge in shape. The bench vice and metal files are the things you will need to actually sharpen the mulching blade. You will need the long-handled wrench for getting the fastener off of the mulching blade and then attaching it after the blade is sharpened. You can get all of these tools and material at your local hardware or home improvement store and it will cost you about 200 dollars. The most expensive aspect of sharpening your mulch blade will be the bench vice which is a piece of equipment that is used to clamp down on metal.

Make sure you turn the lawn mower over so it is on its side and place a board between the deck of the mower and the blade. The wedge will help keep the blade from spinning as you remove the bolt in the center of the blade. If you are working on a gas-powered mulching mower then you want to make sure that the oil and gas reservoirs are placed in a position so they do not leak all over the place.

When you are taking the mulching blade off of the mower, you should put some kind of indicative marker on it so you know which side is the bottom of the blade. Since the blade will look the same on both sides when you take it out, it is very easy to mistake the two sides. You can do this by putting a circle on the bottom in permanent marker or place a piece of tape on one side and then label it. You never want to place the blade back into the mulching mower upside down because this will prevent you from getting a good cut when you go to mow.

Take a wrench that has a long handle and loosen up the blade fasteners with it which might take a while to do. Some of the time the fasteners might be on there really tight which is why it is important to have a long-handled wrench available. Remove the mulching blade and then place it into the bench vice. You want to study how the angle of the mulching blade looks because you do not want to mess up the original angle of the blade.

Once you know the original angle of the mulching blade you can start cutting the edges of the blade with a metal file. Since you are sharpening a mulching blade, it might need more than one file type or shape to sharpen it correctly. The mulching blade should be sharpened until it feels about as sharp as a kitchen knife used to cut butter. Once that side is sharpened you can then loosen it from the bench vice and turn it over so you can sharpen the other side of the mulching blade.

After both sides of the mulching blade have been sharpened you can then remove the blade from the bench vice and begin attaching it back to the mulching mower. You want to use the piece of wood while doing this also to keep the mulching blade from moving while you attach the blade fastener securely.

Double-check the fastener to make sure you have secured it back onto the mulching mower before you go any further to prevent it from flying off while in use. Lastly, remove the piece of wood and then all you have left to do is place the spark plug wire back on the mulching mower. If you follow all of these steps then you will be able to sharpen your mulching blade with ease which will really help keep your lawn looking healthy and fresh.