Generally you put a honing compound on the blades and turn the blades backwards to sharpen it. It's some work, but it's pretty easy. e.g. http://www.amazon.c

Generally you put a honing compound on the blades and turn the blades backwards to sharpen it. It's some work, but it's pretty easy. e.g. http://www.amazon.com/American-Lawn-Mower-SK-1-Sharpening/dp/B00004R9UM/ http://www.amazon.com/American-Lawn-Mower-SK-1-Sharpening/dp...