How to Change the Blade on a Riding Lawn Mower
When your riding mower fails to leave a nice clean cut, it may be time to sharpen the blades. But if the blades look worn on the edges, and are mottled with small holes, it's time to replace them. Replacing blades on a riding mower does not present a big challenge. Determine the correct blade type by bringing an old blade to the mower shop or by looking in the owner's manual. Your mower may use one, two or three blades, depending on the size of the deck. New blades are already sharpened, so all you need to do is put them on. Does this Spark an idea?
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Instructions
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Remove the keys from the ignition.
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Engage the mower's brakes.
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3
Choose the highest cutting position by raising the mower deck and locking it into that position with the appropriate locking mechanism.
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4
Raise the front end of the mower about 8 inches off the ground using a floor jack and chock the rear wheels.
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Locate the nut on each of the blade attaching bolts. There will be one nut for each blade your mower has.
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Remove the nut with an impact wrench and the proper socket. A regular wrench of the right size will also work.
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Pull the bolt down from the underside of the mower, out of the spindle shaft.
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Remove the spacer and blade from the bolt and slide the new blade and the spacer back onto the bolt, being certain the blade is not upside down.
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Push this assembly back up into the spindle shaft, from the underside of the mower.
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Replace the nut and secure it. Lower the mower and remove the chocks.
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Tips & Warnings
If you don't have access to a floor jack, you can use a ramp to elevate the mower.
