Mercury - Gen I Throttle and Shift Cable 9 Foot Mechanical Engine Control 8M0082482. The Mercury Gen I Throttle and Shift Cable is a mechanical control cable designed to connect the control box to the engine for direct throttle and shift input. Built for legacy Mercury Gen I mechanical control systems, it delivers a natural, predictable feel at the helm-especially important for docking, low-speed maneuvering, and everyday operation on boats that rely on proven mechanical controls. The 9-foot len