31620-ZV1-A01 Regulator Rectifier - Overview. The 31620-ZV1-A01 Regulator Rectifier is an essential component in Honda marine engine systems. It functions to convert alternating current (AC) generated by the engine's alternator into direct current (DC), while simultaneously regulating voltage levels to protect the battery and electrical system from damage. This crucial part ensures reliable and stable electrical performance, maintaining the integrity of your engine's operation. Designed to exact