40201-ZW1-020ZA Case Nh282mu - Overview. The 40201-ZW1-020ZA Case Nh282mu is an essential extension case that supports the Honda marine engine system. This part acts as a protective housing component, contributing to the structural integrity and efficient operation of the outboard motor. Designed specifically to fit select Honda marine engines, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Extension case designed for Honda 75-