Mercury - Platinum Plus Throttle and Shift Cable 6 Foot Mechanical Engine Control. The Mercury Platinum Plus Throttle and Shift Cable is designed for boats equipped with Mercury Gen II SAE mechanical control systems where smooth, predictable response is important. Built with Platinum Plus construction, it provides a direct mechanical connection between the helm and the engine while offering lighter, more refined movement than standard mechanical cables. The 6-foot length is well suited for short