I accidentally backed my mower up while running and it shredded the rubber flap/mud guard to pieces. I've looked online and I haven't found a replacement. Do I need one? And if I do, where can I buy one? Thanks.
I haven't had to replace mine, but on my mower (the original 20-inch push mower) you just have to remove the four screws holding on the shield.
I checked the manual for the self-propelled mower and on that one you do need to remove the rear wheels.
There are detailed instructions for replacing the shield as well as removing the wheels in the manual for your specific mower. You'd be better off consulting that because there are detailed illustrations.