Mercury - Ignition Adapter Non-DTS 14-Pin to 10-Pin Ignition Harness Adapter 84-896539T05. The Mercury Non-DTS Ignition Adapter is designed for mechanical control setups where a fourteen-pin boat harness must connect to a ten-pin engine ignition port. It is commonly used during repowers or engine upgrades when existing boat-side wiring remains in place. This adapter allows the two systems to connect properly without replacing the entire ignition harness, helping keep the rigging layout clean and