56166-ZW1-701 Filter - Overview. The 56166-ZW1-701 Filter is an essential component designed specifically for Honda marine engine systems. It functions as a filter element that removes impurities and contaminants from the marine engine fluids, ensuring smooth operation and extending engine life. Crafted to match factory specifications exactly, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. OEM Filter element designed to purify