With the mower still on its side grab your socket wrench and wood block. Place the block inside the blade well. This is to prevent the blades from turning while you loosen their bolts. Remove the blade mounting bolt/bolts. A typical mower will have one blade like the Craftsman 37700 I serviced for this guide (one mounting bolt). Some like my Honda HRR216VKA have two blades an upper and a lower (two mounting bolts). Each blade should have at least two cutting edges.
Several buyers suggest coming up with a mowing pattern that moves away from the outlet and thus makes it harder for you to trip over the cord. One buyer found that the motor would get dirty during use and recommended opening it up and cleaning it with compressed air. When you first lay eyes on the Sun Joe MJ401E Mow Joe 14-inch 12 Amp Electric Lawn Mower you may be struck by how small it is. At 29 pounds it weighs almost half as much as the next lightest mower on our list. This makes it easy to maneuver but it does raise questions of durability.
Your Best Digs also recommends the Sun Joe mower but the reviewer also added a number of caveats. He found it will get the job done if you prefer to only bag and just have $100 to spend. However the clippings compartment filled up quickly for him. And the height adjuster felt flimsy and required adjustments on each wheel.