58130-ZX2-T21 Prop (15-1/4X19) - Overview. The 58130-ZX2-T21 Prop (15-1/4X19) is an essential component of Honda marine engine systems. This genuine OEM three-blade aluminum propeller plays a critical role in translating engine power into efficient water propulsion, ensuring reliable and smooth boat movement. With its diameter of 15.25 inches and pitch of 19 inches, it is designed to optimize thrust and maneuverability in various boating conditions. Built to exact factory specifications, it ensu