Mercury - Quicksilver Distributor Cap Kit For MerCruiser Black Scorpion Tow Sports Engines 805759T05. Overview. Tow sports engines take a beating - long idle times, high heat, and constant load. The Mercury Marine 805759T05 Quicksilver Distributor Cap Kit is designed to keep your MerCruiser Black Scorpion engine firing perfectly no matter how hard you run it. This complete kit includes the distributor cap, rotor, and gasket, all engineered for durability and precision. Made from high-strength co