Mercury - Quicksilver 8M6001743 Air Injector Assembly Direct Fuel Injection System Marine-Grade Component 8M6001743. Overview. Anyone who's spent time running a 2-stroke Mercury outboard knows that when the engine breathes right, everything about the day feels easier. Power comes on smoothly, throttle response tightens up, and that unmistakable 2-stroke growl settles into a steady rhythm. The Quicksilver 8M6001743 Air Injector Assembly is built to keep that feeling alive. Designed specifically f