28431-ZV4-003 Friction Plate - Overview. The 28431-ZV4-003 Friction Plate is a critical component within Honda marine engine transmission systems. It supports the smooth engagement and disengagement of gears, allowing precise power transfer to the propulsion system. This friction plate is engineered to maintain reliability and long-lasting performance, ensuring your Honda marine engine operates efficiently under various conditions. Designed to integrate seamlessly with existing parts, it maintai