40201-ZV7-722ZB Case *NHB14M* - Overview. The 40201-ZV7-722ZB Case *NHB14M* is an essential component designed specifically for Honda marine engine systems. This case extension plays a critical role in maintaining the structural integrity and reliable operation of the engine by protecting and housing key components. It ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine OEM Honda part manufactured to exact factory specification