Mercury - Quicksilver Voltage Regulator Kit Charging System Marine-Grade Construction 883072T2. Overview. Every boater knows the comfort of glancing at the gauges and seeing everything calm and steady - voltage right where it should be, no flicker, no dimming, no surprises. That sense of stability is something you feel deep in your gut, especially when you're miles from home with nothing but open water and a humming engine beneath you. This Mercury Marine part helps create that feeling. A good v