31750-ZY6-003 Regulator Assembly - Overview. The 31750-ZY6-003 Regulator Assembly is a vital electrical component used within the charging system of Honda marine engines. This regulator assembly supports the engine's electrical system by managing voltage output to ensure consistent power delivery to onboard electronics and proper battery charging. Designed for seamless integration with Honda marine engine systems, the part maintains optimal performance and durability by precisely regulating volt