Self-propelled mower
Also called: self-propelled lawn mower, walk-behind mower
A walk-behind mower with a drive system that turns the wheels, so you steer rather than push. The standard choice for lots up to about a quarter acre; it costs $150–$250 more than a push mower and is worth it on any slope or lot over 1/8 acre.
Self-propelled mowers come in front-wheel drive (cheapest, fine on flat lots, easier to turn), rear-wheel drive (better traction on slopes and with a full bag), and all-wheel drive (hills and rough ground). Variable speed, which lets you match the mower’s pace to your walk, is worth having.
Typical prices: $400–$550 for a gas 21-inch model, $400–$700 for battery. Expect 8–10 years of service with annual oil changes, a fresh air filter and plug, and the fuel drained or stabilized before winter. Push mowers ($250–$350) remain a sensible choice for small, flat lots under about 5,000 square feet.
For lots over a half acre, a walk-behind of any kind becomes a time problem; that’s riding-mower territory.