John Deere ZTrak (zero-turn-radius) Mowers are highly maneuverable and offer the ultimate experience in mowing productivity, reliability, and durability. They help operators cover more acres faster and more dependably with a high quality of cut. Mower decks, including those with Mulch On Demand™ (MOD), are located underneath the operator, which permits mowing in tight spaces. A variety of engines offer a choice of power and features, including a models with electronic fuel injection (EFI) and flex fuel (FF) engines.