31600-ZV4-661 Rectifier (12a) - Overview. The 31600-ZV4-661 Rectifier (12A) is a vital electrical component specifically designed for Honda marine engine systems. This rectifier plays a crucial role in converting alternating current (AC) generated by the stator into direct current (DC), which powers the boat's electrical systems and charges the battery. Supporting the charging system, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Featur