Briggs & Stratton 390128 Engine Switch-Starting

The Briggs & Stratton 390128 Engine Switch-Starting operates by completing or interrupting the ignition circuit to control start and stop operations through a keyed or push control mechanism. Electrical signals are routed through the internal contacts, allowing engagement when the switch is activated and disengagement when released, maintaining circuit continuity based on position state changes and supporting ignition command transmission within the starting system architecture. It is installed on the engine control panel or operator console depending on equipment configuration and wiring layout requirements for compatible small engine assembly integration standards.