91202-HC5-005 Oil Seal (17x27x5) - Overview. The 91202-HC5-005 Oil Seal (17x27x5) is an essential component for Honda marine engine systems. This genuine Honda oil seal plays a critical role in preventing oil leaks and contamination within the engine assembly, thereby ensuring reliable and efficient operation. Designed to precise factory specifications, the seal fits seamlessly into the engine's crankcase or oil case system, maintaining optimal lubrication and protecting critical internal compon