Mercury - Quicksilver 8M6007462 Alternator 10SI Series Marine Charging 12-Volt / 63 Amp 8M6007462. Overview. There's a kind of quiet confidence that comes from knowing your electrical system won't let you down-whether you're running upriver at sunrise or easing back into the slip after a long day on the water. A dependable alternator keeps that feeling alive. It keeps the battery strong, the gauges steady, and the engine ready to answer every throttle push without hesitation. With the Quicksilve