YARDWORKS 21" Self-propelled FWD (front-wheel-drive) lawn mower for sale. $400 FIRM. This is a MEDIUM-DUTY lawnmower with a powerful Honda 160cc auto-choke engine (just pull the cord and the mower starts) so it will handle standard to large sized residential lawns. This mower is FWD self-propelled, so while it will self-propel, it is more meant as a power-assist to take the pushing force required out of mowing. It can mulch grass with the integrated mulching plug, or be used with the included grass bag. It also has large rear wheels, which make rolling and turning much easier compared to a standard mower. I am a small engine mechanic and have fully serviced this mower: -new spark plug -new air filter -new engine oil -carburetor has been disassembled and serviced -blade has been sharpened and balanced -new blade adapter installed -self-propulsion has been tested -has been inspected and power-washed -90day no-start warranty