Usually between 2800 and 3000 rpm. It could go faster, but blade tip speed becomes dangerously high past that.
counterclockwise
You can turn it both ways to see how sharp it is.
counterclockwise
counterclockwise
The opposite direction that the blade rotates. In this case I would say counter clockwise but their should be a marking somewhere on the mower that shows blade rotation direction.
if its a rider you remove the deck, turn it over, clamp the old blade in place, & get a large wrench to fit the nut holding on the blade(s). if you have one, use an impact wrench. remove old blade(s) after you remove the nut. take off old blade and put on new one. replace nut and reinstall the deck. if its a pusher just turn mower on its side and use above instructions.hope this helped and good luck
They are standard thread. Counter-clockwise to loosen.
It is natural for fluid to seek its own level when a container is tipped. When you turn the mower "on its side" for blade removal/installation, do not turn it on the carburetor side - turn it to the oppsite side instead.
A dull mower blade will "tear" the grass instead of "cut" it. The jagged blades of grass will dry up and cause your lawn to look brownish or even yellowish - much like when cut grass clippings turn from green to brown/yellow as they dry up.
To remove the fastener that holds a mower blade on, turn the fastener in the direction the blade rotates to cut the grass. Look at the blade, find the "leading" or sharp edge, and, while holding the blade, turn the fastener in that direction. There is a good reason that this is always true. It has to do with the physics of the machine. Imagine the fastener being "held in place" to stop it from turning as the machine starts. With the machine starting to turn, the fastener will tighten. The last thing you want is to have the fastener become loose when the machine is running. The blade could kill or injure someone if it came off. That's why the fasteners that hold the blades on these machines always come loose when turned in the direction the blade rotates.
To remove the fastener that holds a mower blade on, turn the fastener in the direction the blade rotates to cut the grass. Look at the blade, find the "leading" or sharp edge, and, while holding the blade, turn the fastener in that direction. There is a good reason that this is always true. It has to do with the physics of the machine. Imagine the fastener being "held in place" to stop it from turning as the machine starts. With the machine starting to turn, the fastener will tighten. The last thing you want is to have the fastener become loose when the machine is running. The blade could kill or injure someone if it came off. That's why the fasteners that hold the blades on these machines always come loose when turned in the direction the blade rotates.