40212-ZY6-020ZB Drain Nhb14m Cvr - Overview. The 40212-ZY6-020ZB Drain Nhb14m Cvr is an essential component designed specifically for Honda marine engine systems. This drain cover plays a crucial role in protecting drainage points within the marine engine system, preventing contamination while ensuring efficient water flow and drainage. Crafted to fit precisely, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine Honda OEM d