38580-ZY6-013 Main Relay Assembly - Overview. The 38580-ZY6-013 Main Relay Assembly is an essential electrical component within Honda marine engine systems. It functions as the control relay managing the flow of electrical power to critical engine functions, ensuring proper operation and reliable engine starting. Designed specifically for Honda Outboard engines such as the BF135A4 and BF150A4, this genuine OEM part guarantees seamless integration with existing systems, maintaining optimal perfor