Lawn mower blades must be replaced after so many hours of cutting, and the steps in this instructable explain how to perform this simple parts replacement.

Broken, dull, damaged, and mismatched mower blades can cause a number of easily-noticed symptoms.

Damaged mower blades can cause excessive vibration in the mower, while dull mower blades usually get noticed by the ugly, irregular patterns they make in the lawn.

Mower blades can be sharpened several times to extend their life and ensure that your grass gets a healthy cut, but they can only be filed so many times before a blade replacement is necessary.

If you need to replace a lawn mower blade, you can do so at eReplacementParts.com

Homeowners can save themselves quite a bit of money performing simple repairs like this one. New mower blades tend to be reasonably priced, and mower blade replacements usually only require the use of a wrench.

For information about matching a replacement mower blade to your mower, please read the article, Lawn Mower Blade Measurements and Types.

Steps to Replace a Lawn Mower Blade

Mower blade mounting designs vary, but the basic steps are usually the same. Most mowers have use a very simple blade mounting design like the mower we use below as an example .

Step 1: Set the Mower on its side

Always set the mower on the side that does not have a carburetor so that the mower's fuel does not leak out.

Make sure the gas and oil caps are screwed on tightly before tipping the mower.
<p>I replaced the mower blade, but the shaft rotates when I try to tighten or loosen the bolt. What is the problem?</p>
Drain your gas first. You can siphon it to make it easiest. Don't worry about a little left in the tank. The bigger concern is tilting the mower with the MUFFLER in the air. Otherwise, you will likely drain oil into the muffler and it will smoke terribly until it all burns out. There isn't an easy way to clean oil out of a muffler, especially if the bolts/threads are rusted.<br><br>Furthermore, use a breaker bar or a ratchet with a pipe if you don't have an impact gun handy. A wrench is much more likely to slip off and leave you with scrapes and cuts. You can use a C-clamp or anything else to stop the blade from rotating so you can use both hands to steady the tools. <br><br>If you buy parts from your local mower shop, you'll be more likely to get the right part and have it that day. You can take in your old blade or just the model numbers from the frame if you don't know the part number. <br><br>If you're looking to sharpen your blade, make sure to check the balance. You can buy a blade balancer or you can use a screwdriver with a round shaft passing through the center hole of the blade. If one side keeps dipping down, grind more off of that side until it balances.
<p>Step 1 should read: Remove plug wire from plug. The last thing anyone wants to see is a lost finger because you accidentaly started your mower. </p>
THANK YOU! Thank you for easy to understand instructions plus pictures. My boyfriend AND my adult son BOTH told me that I COULD/SHOULD NEVER set my lawn mower on it's side - EVER. I told them it was safe if I put it on the proper side - but they said there was NO &quot;proper&quot; side. <br>They agreed to settle on whatever YOU said, therefore I WON and was able to change my blade without any more interruption! <br>Thank You Again!
Small world !!!! i just ordered some parts for a mower from you guys !!!!!!!!!!!!!!!!!!
I use a pneumatic impact gun to remove mower blades. Bang and it is done. If I had to do it with hand tools the last tool I'd pick would be a ratchet. I'd use either a breaker bar or the combination wrench like what you're putting the blade back on with. A few taps with a mallet or scrap of wood on the end of the tool in the direction you want to spin would loosen the nut fast.<br><br>I get dozens of sharpenings out of a blade too not just a few like you said. I sharpen my tractor blades every other cut and only replace them every other year.
I sharp it with the hand grinder. It functions!
Me too!
Make sure to hang on to any mower pieces that help mount the blade, like the retaining plate pictured in Step 3.
That mower blade and nut look really clean compared to mine. How do you get the nut off when everything is covered with the green-black crud that won't come off?
I agree with rimar2000, all you need to do is sharpen the blade on a grinder.<br><br>http://evacuumstore.com/s-1-electrolux.aspx
Shouldn't you disconnect the spark plug in order to make sure the mover won't start if you rotate the blade?

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