Mercury - Quicksilver 2-4-C Marine Grease with PTFE Lubricant & Grease Gun Kit 3 oz Cartridge 74057Q5. Overview. Regular lubrication keeps your boat running smooth, quiet, and corrosion-free. The Mercury Marine 74057Q5 Quicksilver 2-4-C Marine Grease Gun Kit combines Mercury's trusted 2-4-C Marine Grease with PTFE and a flexible pressure gun for easy application. This lithium-based grease stands up to high pressure, heat, and water exposure, making it perfect for steering systems, prop shafts, t