Mercury - Gen I Throttle and Shift 15 Ft Mechanical Control Cable 8M0085960. The Mercury Gen I throttle and shift cable is designed for Mercury mechanical control systems that require a longer mid-range routing distance between the helm and engine. It is commonly used on center consoles and helm layouts where shorter cables feel stretched but oversized lengths would introduce unnecessary slack. The 15-foot length allows the cable to route naturally through the rigging path while maintaining prop