63715-ZX2-C01ZA L Eng NHB14M CVR - Overview. The 63715-ZX2-C01ZA L Eng NHB14M CVR is a genuine Honda OEM cover designed specifically for the left engine section of Honda marine engine systems. This cover serves as a protective casing that shields the lower left part of the engine, contributing to the overall reliability and durability of marine equipment. Crafted to match factory specifications, this part ensures seamless integration and maintains optimal performance within your marine engine as