Mercury - Marine Engine End Fuel Connector Fuel System Series Marine-Grade Metal F213238Q2. Overview. There is a certain kind of trust you build with the small parts on your boat-the ones you rarely think about until you absolutely need them. A solid fuel connection is one of those pieces. When it clicks into place cleanly and the fuel flows without hesitation, you feel that quiet confidence settle in. Whether you are drifting across a calm lake at sunrise or easing away from the dock after a lo