seen in the third picture. a way to check to make sure the blade is oriented correctly is to have the sharp edges be doing the cutting if the blade turns in a clockwise motion while looking at it from the top, as seen in picture one.
4. repeat steps 2 and 3 until all the blades are changed.
after replacing the dull blades with sharp ones, the next step is to place the blades back onto the mower.
caution: because some blades are different lengths, when putting the blades on, make sure to place the same length blade where it was originally.
1. crawl under the lawnmower deck with the correct length blade 