91355-ZW1-701 O-Ring (3.5x41.7) - Overview. The 91355-ZW1-701 O-Ring (3.5x41.7) is a critical sealing component used within Honda marine engine systems, specifically designed to support the power trim and tilt system. This O-ring plays a vital role in creating a tight, leak-proof seal which prevents water, oil, or hydraulic fluid leaks, thereby ensuring the reliability and smooth operation of the equipment it serves. Built to factory specifications of 3.5mm cross-sectional diameter and 41.7mm in