Ryobi RY40109 20" Mower Blade Replacement

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Introduction

Operating your mower with a dull blade can be hard on your lawn, leaving the grass tattered or torn rather than cut. This will cause it to look yellow and restrict healthy growth. Also, a damaged blade can be a danger to the operator or nearby people.

Replacing the blade isn't difficult and is a task that anyone should be able to complete in 15-30 minutes. There are some things to keep in mind as you start this project though. You will be working with a sharp object (the blade), so using a pair of heavy-duty gloves, removing the battery, and carefully blocking the blade are important safety measures to keep in mind as you start your work.

Once you've completed the replacement, I recommend mowing your yard right away and experience the satisfaction of your crisply mowed lawn!

What you need

Step 1 Blade

Ryobi RY40109 20" Mower Blade Replacement, Blade: step 1, image 1 of 3

Ryobi RY40109 20" Mower Blade Replacement, Blade: step 1, image 2 of 3

Ryobi RY40109 20" Mower Blade Replacement, Blade: step 1, image 3 of 3

Before working with the blade, remove the battery.
Firmly grasp the battery, depressing the battery release and slide the battery out.

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Step 2

Turn the mower upside down on a flat, stable surface.

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Step 3

Preventing the blade from spinning is an important safety step!
Use an 8" to 10" block of 2x4 to prevent the blade from spinning counterclockwise.
You may have to experiment a bit to position it correctly.

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Step 4

Protect your hands by putting on your heavy-duty canvas gloves while working around the blade.
Using a 15 mm socket wrench, remove the blade nut by turning it counterclockwise.

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