* Forward ground speeds up to 7.4 mph controlled with a single forward speed lever (patented) that can be changed on the go. Pistol grip hand controls allow maximum maneuverability, reducing operator fatigue. * Your choice of engines: 16hp, 17hp, 19hp, or 21hp Kawasaki V-twin, or a 18hp Kohler engine. * Choose from a 36"Advantage™, or a 48", 52" or 61" Velocity Plus™ cutter deck. Scroll down for a complete list of engine and cutter deck combinations. * Heavy-duty hydraulic drive system includes dual 10cc Hydro-Gear pumps, which feature larger input bearing for maximum reliability, and Ross hydraulic motors for reliable, zero turn maneuverability. * "Adjust-A-Trac" feature lets you conveniently adjust neutral and tracking settings instantly, in the field * Heavy 1/2"-diameter Spiralock cutter deck mounting hardware increases deck mounting strength. * Heavy gauge handlebars are adjustable to provide additional comfort for taller operators. Handlebars have three height settings and fit a wide variety of operators. * Redesigned handlebars allow for more comfortable operation, with reduced handlebar diameter and adjusted steering lever angle. Twin hand controls with spring assisted EZ-GRIP allows for smooth, precise responsiveness. EZ-GRIP reduces the amount of hand force required to operate the mower for increased operator comfort. * Operator presence controls are vinyl-dipped and designed for operator comfort. * Large 6 gallon, rust-free fuel tank keeps you in the field cutting. This tank design is 20% larger than tanks on other mower brands. Molded-in cup holder provides added operator convenience and comfort. * Convenient dash panel puts the controls at your fingertips, including key switch, throttle, electric blade brake switch and optional hour meter. The parking brake prevents movement during trailering and parking on slopes. * Ogura PTO clutch brake engages the cutter blades. Adjustable airgap ensures long component life. * "Split-Steel" pulley design is stronger than cast iron or stamped pulley designs. They are precision matched and lightweight for reduced inertia and decreased wear on the cutter deck drive system. * High-quality bearings and bearing debris guard on idler pulleys ensure long, reliable service. * Tapered lock hubs on hydro pump pulleys provide added reliablilty and ease of service. * Marbain cutter blades stay sharp longer for reduced maintenance. Heavy-duty blade drive spindles provide unbeatable performance. * Extra durable front caster arms are designed to handle rough environments. * Heavy-duty Flat-Free caster wheels with quick pin removal for easy maintenance and cutting height adjustments. Semi-pneumatic tire design virtually eliminates downtime and expense resulting from flat front tires. * De-clutch cold start feature enhances cold weather starting by removing the load of the hydraulic pumps at startup. * Adjustable front center anti-scalp wheel (on models equipped with front center roller). * Spring tensioned hydraulic drive belt system eliminates adjustments and adds to belt life and reliability. * Double stacked roller bearing in cutter deck idler pulley adds to reliability. * Flexible discharge chute will not dent like metal chutes. * User-friendly design allows quick, clean access to the engine and filters, for easy maintenance. * The Scag "Simply the Best" commercial warranty stands behind you and your mower for years of profitable service. * There are many, time saving accessories for the SWZ Walk Behind like grass collection systems.