Mercury - Alternator Heavy-Duty Industrial & Marine Series Corrosion-Resistant Finish 8M6007512. Overview. When you depend on your equipment day after day-whether you are running a commercial boat, working an industrial site, or hauling with a heavy truck-you need electrical power you never have to second-guess. The Quicksilver 8M6007512 Alternator brings that kind of certainty. It is the steady heartbeat behind ignition, electronics, pumps, lights, and every system that counts on clean, reliabl