Mercury - Platinum Plus Throttle and Shift Cable 18 Foot Mechanical Engine Control - 858342A18. The Mercury Platinum Plus Throttle and Shift Cable is designed for Mercury mechanical control systems where smooth, reliable response is required across longer routing runs. Featuring Platinum Plus construction, this cable delivers a direct mechanical connection between the helm and engine while reducing internal friction to provide a refined, consistent control feel. The 18-foot length supports exten