91253-ZW1-B02 Seal (10X21X6) - Overview. The 91253-ZW1-B02 Seal (10X21X6) is a vital component in Honda marine engine systems, specifically crafted to prevent water leakage and contamination in the water pump vertical shaft system commonly found in Honda Marine engines such as BF75, BF90, BF115, and BF130 series. It plays an essential role in maintaining engine integrity and ensuring reliable, efficient operation by sealing critical points against fluid loss and corrosion. Meticulously designed