Exmark VXS730GKA52400 52" Vertex S-Series Stand-on Zero-Turn Mower with FX730V Engine. The all-new Vertex stand-on zero-turn mower is ready to take your productivity and profitability to the next level. With a design that centralizes mass low in the mower chassis, Vertex is ultra-maneuverable, yet stable and easy to control. The control panel is ergonomically designed and centrally located to improve operator comfort. Exmark's proven hydro drive system delivers ground speeds of up to 8.5mph, enabling Vertex to quickly finish large jobs. Built with a Kawasaki V-Twin or Kohler EFI engine to increase fuel efficiency so you can stay out in the field longer.