Ferris SRS Z1 Series 48" Mower Stand On Vanguard 627cc EngineFerris SRS Z1 Series 48" Mower Stand On Vanguard 627cc Engine Soft Ride Stand On (SRS) Z1 Mowers Z1 SRS Features: Vanguard, Kawasaki FX600V or FX691V engine options. The PTO conveniently disengages when the operator leaves the platform to move an obstacle or pick up debris. When the operator steps back onto the platform and re engages the PTO switch the blades start again for continued mowing. Easy locking 3 position ground speed control ensures