Remove and Replace a Lawn Mower Blade Step by step, here’s how to remove the lawn mower blade from your walk-behind mower in 5 Easy steps. If yours is a gas mower, run the mower dry or use a turkey baster to remove the gas before you start this project. This will keep the gas from spilling when the mower is on its side.
Each season, you need to make sure that your lawn mower’s blade is sharp enough. It’s also important to learn how to Remove and Replace lawn mower blade on your own.
If you want to sharpen the blade on your own, you’ll have to do this, of course. It doesn’t matter whether you have a professional do it or not. You’ll save money by taking the mower blade off the deck and taking it with you instead of delivering the mower to the shop with the blade in it, which costs more.
There is a company called Cary Mower & Saw in the city of Cary, NC, that charges $8 to sharpen a blade that has been removed from the mower deck and $30 to sharpen a blade that is still inside the mower deck.
It’s important to keep your lawn mower blade sharp. For one thing, a blade that isn’t sharp hurts your grass by making a ragged cut. That can lead to bare patches and other things that aren’t pretty, as well as invite sickness. There is also more work for the lawn mower’s motor if its blade isn’t sharp. That means your mower will use up more battery power or gasoline each time it cuts a piece of grass.
As a general rule, we recommend a few honing’s of your lawn mower blade each season. If you have rocky soil or hard turf grass, your blade might need more. When in doubt, look at the lawn after you’ve mowed. There are a lot of broken ends on the grass blades. This means that your blade isn’t sharp enough. Another sign is brown-tipped grass blades.
Professionals at your local hardware store or power-equipment shop can do the actual sharpening for you. They’ll charge you $7 to $10 for each blade. It’s a good idea to have an extra blade so that you can have a sharp one on hand when your other one needs to be fixed.
Learn Remove and Replace a Lawn Mower Blade In 5 Easy Step
Step by step, here’s how to remove the lawn mower blade from your walk-behind mower in five simple steps. If yours is a gas mower, run the mower dry or use a turkey baster to remove the gas before you start this project. This will keep the gas from spilling when the mower is on its side.
Step 1
Make sure there’s no way the engine can start. With a battery mower, take out the batteries. With a gas mower, take out the spark plug, as well as the battery pack. Then, turn the mower on its side, and do the same thing with it. With a gas mower, you’ll want the air filter to be facing up to keep the oil from getting into the filter and making it dirty.
Step 2
Make sure you don’t get hurt by the sharp blade. Wear thick work gloves. Lock the lawn mower blade in place by putting a 2×4 block between it and the mower deck (a C-clamp can help hold it in place if needed). Then, use a wrench or socket to loosen the screws or bolts that hold the blade to the drive shaft. Depending on how many bolts there are, there may be one or two, with or without extra washers.
Step 3
Remove the blade assembly, then take a picture of it with your phone so you know how to put it back together. As a bonus, your owner’s manual should have a picture of this. Then, take the lawn mower blade to a shop to get it sharp.
A metal file or bench grinder could be used to try to sharpen the blade on your own. The manager of Consumer Reports’ outdoor power equipment testing says that if you already own a Dremel rotary tool, that brand’s attachment for that tool can help you sharpen the blade. In hardware stores, you can buy it for about $15. You can also buy it online and at home centers.
Step 4
Take a picture of the blade assembly and put it back together in the same way you did before. It’s important that the cutting edge of the blade goes in the same direction as the blade moves. There will be two wings on the lawn mower blade that point toward the mower deck. Any writing on the blade will likely be facing away from the mower deck. Washer: If there is one, its concave side will be facing the blade.
Step 5
As soon as you’re ready to tighten the bolt again, put on your work gloves again. A combination wrench can be used to tighten a bolt on the opposite side of the mower deck. Insert the wooden block again and tighten the bolt with the wrench.
Some manufacturers say that a torque wrench should be used for this job because overtightening a bolt could cause it to break, while undertightening it could let the lawn mower blade fall off while the mower is running.
Clean the underside of the mower deck before you flip it over. If you have silicone spray, you can also apply a light coat. This will keep the clippings from blocking air flow. With a sharpened blade, that measure could make the mower more energy-efficient while keeping your lawn and your lawn mower in top shape at the same time, too.
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