It’s also best to do this when there’s no gas in the mower. Wait until you use it all up to change the blade, or you might consider draining out the gas with syphon hose. Typically, self-syphon pumps are sold at any hardware or automotive parts store. This prevents gas spillage onto the mower body.
Pay attention to the position of the blade as you’re removing it. You’ll mount the new one in the same orientation, usually with the sharp edge of the blade going counter-clockwise with the turning of the assembly. Again, this may not be true on all mowers, so pay attention to the way this blade is installed and install the new blade accordingly.
Some mowers feature a bottom cap on which two shorter separate blades are attached, while some newer push mowers feature a single longer blade, that looks kind of like a ruler. Tilt the mower back to inspect the blade, or talk to someone at the hardware store about the type of blade appropriate for your brand of mower. You can also check in the owner’s manual, if you have it. [4] X Research source Alternatively, you can salvage the old blades and have them sharpened if they seem to be in decent condition. If the blades are worn out, with chips or chunks out of the metal, it’s probably wise to get a new set.
Most blades are either specific or universal fit. Be sure you have the same length as the old blade before mounting the new one, and make sure the clearance from the lawn mower deck is the same. Tighten the new blade onto the bolts carefully, since it’ll likely be much sharper than the old one. It’s a good idea to wear thick mechanic gloves when doing the job, to keep your hands safe. It’s also advisable to use a small piece of wood to stop up the blade from turning while you reinstall it. You can jam a small piece of wood between the blade and the mower deck to keep things from turning. [6] X Research source
After a quick inspection, you should be able to start up your mower and start cutting that grass much more efficiently with your new blades.
