Mercury - 2-4-C Marine Grease with PTFE Multi-Purpose Grease Kit 3 oz Cartridge & Pistol-Grip Gun 74057K5. Overview. A little grease goes a long way toward keeping your boat running smooth. The Mercury Marine 74057K5 2-4-C Marine Grease Kit includes a 3-ounce cartridge of 2-4-C grease with PTFE and a compact pistol-grip grease gun for quick, one-handed use. This is the same tough, water-resistant grease Mercury uses on new engines and accessories. It protects against corrosion, friction, and wea