Mercury - Ignition Harness Adapter Non-DTS 10-Pin to 14-Pin 84-858740T06. The Mercury Non-DTS Ignition Harness Adapter is designed for mechanical control setups where a ten-pin boat-side ignition harness must connect to a fourteen-pin engine ignition port. It is most commonly used during repowers where the existing control wiring remains in place but the engine ignition connector style has been updated. This adapter allows the conversion to be completed cleanly without replacing the entire ignit