Mercury - Gen I Throttle and Shift 17 Ft Mechanical Control Cable 8M0085956. The Mercury Gen I throttle and shift cable is designed for mechanical control systems that require additional length for clean, stress-free routing. It is well suited for larger consoles and deeper helm layouts where shorter cables may feel stretched or create tight bends. The 17-foot length allows the cable to route naturally from the helm to the engine, helping maintain smooth control feel and reliable operation.. Usi