30416-ZVL-B10 Case - Overview. The 30416-ZVL-B10 Case is a vital component within the Honda marine engine systems. It supports the engine's internal mechanics by providing a durable housing that helps maintain the structural integrity of pivotal engine parts. Designed specifically for Honda's marine engines, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. A robust OEM component designed to meet factory specifications, ensuring a