How to Change Mower Blades

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How to Change Mower Blades

The lawn mower was invented by Edwin Beard Budding in 1930. After seeing a cutting cylinder which was used to trim clothes at a local cloth mill, he got the idea of coming up with a similar concept to cut grass. Lawn mowers have several parts, but the blades are some of the most vital for the mower’s performance. Mower blades are made of strong metals so as they can withstand high speed.


The Types of Lawn Mower Blades

There are several types of blades used in different lawn mowers. Here are some common blades available in local hardware stores and also online.

Lifting Blades

This type is characterized by a slightly curved surface that tends to make a vertical upward airflow. This airflow lifts up the grass and produces a clean result.

Cylinder or Reel Blades

These types of blades are made up of three to seven helical blades that are attached in a horizontally rotating cylindrical reel. They create scissor-like cutting waves. Unlike other types of blades, the cylinder blades cannot be replaced, thus if one of the blade breaks the entire mower has to be replaced.

Mulching Blades

These are all-purpose blades with curved surfaces that enables users to lift, mow, and mulch. The blades first pull up and cut the grass, then the grass clippings are chopped into tiny pieces inside the deck and the tiny clippings are blown out by air pressure produced by the blade’s innermost curve. These tiny clippings are then used for mulching.


When to Replace Mower Blades

Missed patches in the grass are the first sign that the mower blades are not cutting the grass any more. For a healthy lawn, mowing needs to be done with clean and sharp blades. Replacing damaged and non-performing blades need not be a difficult task. Whether the blade is bent or damaged, replacement can be done easily and within a short time with the correct approach.

Once a new blade has been bought, it’s time to replace the old one. First, find the blade that needs to be replaced. Pay attention to the oil compartment while doing this, making sure not to spill the oil over the engine. Second, unplug the spark plug and remove the bolt which mounts the blade. This can be done using a socket wrench the same size as the bolt. Mark the blade’s position when removing it, as the same orientation will be used to mount the new blade. After removing the damaged blade, mount the new one in the same orientation as the previously removed blade. Install the bolts and nuts using the owner’s manual which usually has the torque specifications for tightening the nuts. Over tightening can make the blade warp and the mower vibrate. Also check that the blade does not wobble when it’s moved up and down. This is done by slowly rotating the blade on the spindle. After a quick inspection, the lawn mower should be in a position to start and cut grass more efficiently with the newly installed blades.

It is instrumental to ensure that safety precautions are followed in order to prevent accidents or motor damage. This can be achieved by wearing thick mechanical gloves when replacing the mower blades for hands’ safety. Also, it is highly recommended to use a small piece of wood when installing a new blade to help stop the blade from turning. After successfully installing the new blades, remove any jacks used to hold the mower in place and let it sit for up to an hour for the oil to return to the compartment. This prevents any motor damage.


How to Buy Mower Blades on eBay

Before replacing mower blades, it is imperative to know what type of blade the mower has in order to purchase the right one. Finding a blade for replacement is quite easy on eBay. Begin by assessing the blade and determining what type it is. Then navigate to the “Home and Garden” category, then to “Yard, Garden and Outdoor Living,” and finally to "Lawn Mowers." Once there, browse the mower blades according to types or brand. The blades on eBay are reasonably priced and customers can ask questions from the seller before buying the product.

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