Here’s a quick video on how to differentiate right/wrong or upside down and right side up when installing a small lawn mower blade. Hope this helps! Like and subscribe for more how-to and helpful hint videos.
Looks like i have the same mower, was gonna see if you could send a picture of how you have your blade set up.. im replacing the blade and this mower has a weird blade adapter
One way is to just look the direction the rope spins the starting wheel. Usually, its clockwise as you are looking down on it. So take the blade and point the sharp edges in the direction of the spin. Knowing that if you are looking at it from the bottom up, its going to be spinning counter clockwise. If that confuses you, seek help. Maybe you shouldn't be operating a gas powered mower.