Mercury - Ignition Harness Adapter Non-DTS 14-Pin to 10-Pin 84-866337T01. This Mercury ignition harness adapter is designed for non-DTS applications where a 14-pin boat-side ignition harness must connect to a 10-pin Mercury engine ignition connector. It is commonly used during repowers or engine swaps when the boat wiring has been updated to a fourteen-pin configuration but the engine retains a ten-pin ignition interface. The adapter provides a clean, factory-style connection without requiring r