41100-ZVL-602ZA Gear Nh565 Case - Overview. The 41100-ZVL-602ZA Gear Nh565 Case is a critical component in Honda marine engine systems. It serves as a robust gear case assembly designed to house and protect essential gears within the marine propulsion system, thereby ensuring smooth mechanical motion and reliable operation. Precision-engineered to factory specifications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine OE