11320-ZVL-B10 Oil Case Assembly - Overview. The 11320-ZVL-B10 Oil Case Assembly is a critical component of Honda marine engine systems. It supports the oil system, providing a protective housing that ensures proper oil flow and containment for smooth engine operation. Designed to meet factory specifications, this assembly guarantees seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine OEM component designed for Honda marine engines, ens