Mercury - Quicksilver Alternator Volvo-Penta Sterndrive & Inboard Series Corrosion-Resistant Plated Finish 8M6007507. Overview. There is a certain comfort in knowing your electrical system will not let you down, no matter where the day takes you. When you are running offshore, trimming through chop, or easing into a quiet marina at sunset, a dependable alternator gives you the steady reassurance that everything on board will keep humming. I have always trusted Mercury Marine parts for that kind