walk-behind mowers otroy-bilt otroy-bilt yard machines 21" high wheel • 159cc troy-bilt ohv engine with autochoke • 3-n-1 tri-action cutting deck • dual-lever 6-position height adjustment 21" high wheel push mower • 140cc troy-bilt ohv engine with autochoke • 2-in-1 cutting deck • tri-action cutting system • dual-lever deck height adjustment 20" push mower • 132cc ohv engine side discharge • 3-position manual height adjustment product may vary by store location and availability