John Deere GY00102 Operator Presence Switch

The GY00102 operator presence switch is a safety-critical electrical component designed to interrupt engine ignition or PTO engagement when the operator leaves the seat. It features a normally closed (NC) contact configuration where the circuit remains complete until actuator depression opens the circuit. The switch utilizes a screw-mount flange for secure attachment to the seat pan, requiring a 2.75-inch (69.85 mm) diameter mounting hole. It is equipped with two male spade terminals for quick-disconnect wiring harness integration. This switch serves as a direct replacement for John Deere OEM part number GY00102 and supersedes A-GY00102. Cross-reference compatibility extends to multiple OEM platforms including Husqvarna 539117398, Cub Cadet/MTD 01003277, Delta Systems 6520-51, Ferris/Snapper/Simplicity 1716368SM, and Briggs & Stratton 1716368. The component is constructed with a thermoplastic housing and silver-alloy contacts rated for low-voltage DC control circuits typical in lawn and garden equipment safety interlock systems.