Allen-Bradley 62351A2 Rectifier

The Mercury/Mariner 62351A2 rectifier is a four-diode bridge regulator designed for 12 V systems on Mercury outboard motors. It is commonly cross-listed with 62351A1 and 816770 and is sold as an aftermarket replacement for Mercury/Mariner outboards in the 6–300 hp range, spanning roughly 1967–2000. The unit uses a square, three-wire/three-post connector with negative polarity, and typical replacement kits do not include a capacitor, brush holder, or diode trio. Key specs include 12 V DC rating, a four-diode bridge configuration, and up to 25 A diode current. It provides DC output to the engine’s electrical system to support battery charging and lighting circuits during operation. When replacing, match the OEM part number and the four-diode bridge arrangement to ensure compatibility with your engine’s charging circuit and year. This rectifier is positioned as a direct-equivalence replacement for the Mercury/Mariner models that originally used 62351A2, helping maintain reliable electrical performance across a broad range of vintage outboards.