40201-ZVD-000ZA Case Nhb14M - Overview. The 40201-ZVD-000ZA Case Nhb14M is a genuine Honda marine engine part designed for the extension case system of the NHB14M series. This case plays a vital role in housing and protecting essential components within the marine engine system. By providing a durable and precise enclosure, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. This OEM extension case is engineered specifically for the