63731-ZY3-A12ZA R *NH282MU* Cover - Overview. The 63731-ZY3-A12ZA R *NH282MU* Cover is a genuine OEM component designed specifically for Honda marine engine systems. This right lower mounting cover plays a crucial role in protecting and maintaining the external parts of your engine, ensuring reliable operation in various watercraft applications. Crafted to original factory specifications, this cover ensures seamless integration with existing parts, maintaining optimal performance and durability.