Mercury - Quicksilver Pistol Grip Grease Gun Maintenance Tool 3 oz Cartridge Compatible 74057Q6. Overview. Simple, clean, and easy to use - the Mercury Marine 74057Q6 Quicksilver Pistol Grip Grease Gun is a must-have tool for any boater. Designed for use with 3-ounce cartridges of Mercury 2-4-C or Extreme Grease, it features a comfortable squeeze-grip handle and a flex-head feed tube that reaches tight spots on your boat or trailer. Whether you're greasing steering linkages, gimbal bearings, or