Mercury - Key Switch Harness Kit Non-DTS 14-Pin Ignition Wiring Kit 896537K20. The Mercury Key Switch Harness Kit (Non-DTS 14-Pin) is designed for mechanical outboard installations that require maximum reach at the helm without transitioning to digital throttle and shift systems. It is commonly used on larger boats, deeper console layouts, or full refits where shorter harnesses cannot be routed cleanly. The extended harness length helps keep wiring relaxed, properly positioned, and free from unn