63515-ZC0-700 L Side Cover Cap - Overview. The 63515-ZC0-700 L Side Cover Cap is a crucial component in Honda marine engine systems. This cap serves as a protective cover on the left side of the engine, shielding vital components from the elements and potential damage. Engineered to exact factory specifications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine OEM part specifically designed for Honda marine engines, ensur