91353-ZY1-871 O-Ring (2.0X34.5) - Overview. The 91353-ZY1-871 O-Ring (2.0X34.5) is a precision sealing component designed for the fuel and marine engine systems of Honda outboards. This essential system part plays a critical role in creating a reliable seal to prevent fluid or gas leaks within the engine components it supports. Engineered and manufactured to match exact factory specifications, the O-ring ensures seamless integration with existing parts, maintaining optimal performance and durabi