40106-ZVT-000 L Eng (Lower) Case - Overview. The 40106-ZVT-000 L Eng (Lower) Case is an essential component of Honda marine engine systems. As a lower engine housing, it supports the engine's lower assembly and connects critical mechanical parts within the marine propulsion system. Engineered for reliability and performance, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. This part is a genuine Honda OEM lower engine case design