41005-ZVA-610ZA Gear *NH246* Case - Overview. The 41005-ZVA-610ZA Gear *NH246* Case is a critical component in Honda marine engine systems. This case supports the gear mechanism, ensuring efficient mechanical motion and protection within the engine's lower unit. Designed to maintain optimal gear alignment and housing integrity, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. This is an OEM/genuine Honda part specifically designe