40106-ZVT-010 L Eng (Lower) Case - Overview. The 40106-ZVT-010 L Eng (Lower) Case is a critical component of Honda marine engine systems. It functions as the lower crankcase, housing vital internal parts and supporting the engine's core mechanical operations. Designed to meet stringent factory specifications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. The 40106-ZVT-010 is a genuine OEM Honda lower engine case, crafted to ex