Mercury - Platinum Plus Throttle and Shift Cable 9 Foot Mechanical Engine Control. The Mercury Platinum Plus Throttle and Shift Cable is designed for boats using Mercury Gen II SAE mechanical control systems where smooth, consistent response at the helm is essential. Built with Platinum Plus construction, it provides a direct mechanical connection between the control and the engine while delivering a lighter, more refined feel than standard mechanical cables. The 9-foot length is well suited for