Mercury - Ignition Adapter Non-Digital Throttle & Shift 10-Pin to 14-Pin with SmartCraft Data 84-8M0153356. The Mercury Ignition Adapter (Non-Digital Throttle & Shift) is designed for mechanical control setups where a ten-pin engine harness must connect to a fourteen-pin boat-side harness while retaining SmartCraft data functionality. It is most commonly used during upgrades where the engine supports SmartCraft but the boat has already been rigged with the newer fourteen-pin harness layout. This