PTO Clutch Lawn Mower Toro - 116-1620

This clutch incorporates an automatic thermal cutoff switch that permanently interrupts the coil circuit at 370°F - protecting the Z Master's electrical system, PTO switch, and wiring harness from the cascade failure that occurs when an overheating clutch continues to draw current with degrading coil insulation. It is a sacrificial safeguard: when the cutoff trips, the clutch stops engaging, but the rest of the machine survives. For commercial crews operating in 90–100°F ambient conditions - where deck and engine heat already push PTO operating temperatures to their limits - this protection comes standard, not as an option.

Toro owns Exmark, and the Z Master G3 and Lazer Z share a substantial portion of their driveline architecture - including the 116-1620 clutch family. One clutch serves the Toro Z Master G3, the Exmark Lazer Z, and the Quest SP - three of the most common commercial zero-turn platforms in the American landscape industry. For dealers stocking parts for both Toro and Exmark customers, for fleet managers running both brands on their trailers, and for independent shops that see both badges roll through their doors, a single SKU covers the two largest names in commercial mowing.

Toro owns Exmark, and the Z Master G3 and Lazer Z share a substantial portion of their driveline architecture - including the 116-1620 clutch family. One clutch serves the Toro Z Master G3, the Exmark Lazer Z, and the Quest SP - three of the most common commercial zero-turn platforms in the American landscape industry. For dealers stocking parts for both Toro and Exmark customers, for fleet managers running both brands on their trailers, and for independent shops that see both badges roll through their doors, a single SKU covers the two largest names in commercial mowing.

Rated at 200 ft-lbs at 12 VDC, this clutch delivers the commercial holding torque required to keep wide decks at full blade speed through peak cutting loads, while operating within the charging-system budget of the 25–37 HP engines on these platforms. The Warner 5218-series coil provides the thermal capacity for 8-to-12-hour commercial duty cycles, with stable resistance that prevents the torque fade that derates residential coils by mid-afternoon. The torque class, current draw, and coil thermal mass are engineered as a system for the Lazer Z and Z Master G3 operating envelope.