Mercury - Quick Disconnect Fuel Line Connector Fuel System Component Brass and Composite 13563T7. Overview. A fuel connection should be simple, secure, and worry-free. The Mercury Marine 13563T7 Quick Disconnect Fuel Line Connector gives you exactly that. Designed for the fuel tank end of your setup, it locks tight with a clean click and keeps your fuel system sealed from leaks and air intrusion. Built from tough, corrosion-resistant materials and engineered to Mercury's standards, it's the kind