87703-ZW7-U00 Flush Mount Mark - Overview. The 87703-ZW7-U00 Flush Mount Mark is a crucial component designed for Honda marine engine systems, specifically supporting rigging and accessories that optimize marine engine operation. This flush mount mark serves as an indicator or trim mark that integrates seamlessly into the control and rigging system, ensuring reliable and precise boat handling and trim adjustment. Built to exact factory specifications and tolerances, it ensures clean integration