22.5 HP Kohler Command Pro engine with Superior fuel efficiency Like no other mower in the mid-size, zero-turn class, the Model B is productive and compact. The Model B possesses the distinct Walker characteristics of being agile, versatile, and easily maintainable while delivering the Walker beautiful cut. The Model B is light on the turf, which not only protects against rutting and other property damage, but also improves efficiency by reducing lost motion and giving quick maneuverability. With a low center of gravity and balanced design, the Model B is agile and demonstrates impressive hillside performance, allowing operators to mow more places with a single machine.With interchangeable decks, attachments, and add-ons like LED headlights and a Utility Bed, the Model B is a productive and versatile year-round machine. Available in two unique configurations with a variety of power options, there is a Model B suitable for any situation.