40202-ZY3-621ZB Separator *NHB14M* - Overview. The 40202-ZY3-621ZB Separator *NHB14M* is a pivotal component within Honda marine engine systems designed to support the fuel system by separating water and impurities from fuel, thus ensuring reliable engine operation. This OEM part plays a critical role in maintaining clean fuel flow, reducing wear, and optimizing engine longevity. Engineered to meet or exceed factory specifications, it ensures seamless integration with existing parts, maintaining