41100-ZVL-902ZB Gear *NH565* Case - Overview. The 41100-ZVL-902ZB Gear *NH565* Case is an essential component within Honda marine engine systems. This gear case supports the drivetrain, housing critical gear mechanisms that facilitate smooth mechanical motion and power transmission within the engine assembly. Designed to the exact Honda factory specifications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine OEM Honda mar