Mercury - Platinum Plus Throttle and Shift Cable 7 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, controlled response is important. Built with Platinum Plus construction, it provides a direct mechanical connection between the helm and the engine while delivering lighter, more refined movement than standard mechanical cables. The 7-foot length works well for compact-to-mid c