Mercury - Quicksilver 8M6007447 Alternator Marine Diesel Charging Series Corrosion-Resistant Construction 8M6007447. Overview. There is a special kind of assurance that comes from hearing your marine diesel fire up and knowing the charging system behind it is solid, steady, and ready for the journey ahead. When you depend on your electrical system for navigation, lighting, communication, and safe operation offshore, that peace of mind matters more than most people realize. Whether you are prepar