90109-ZY3-010 Bolt Cover Lock - Overview. The 90109-ZY3-010 Bolt Cover Lock is a vital component in Honda marine engine systems, specifically engineered to secure engine covers effectively. This bolt plays a crucial role in maintaining the integrity and protection of marine engine components by firmly locking covers in place, preventing damage from external elements and operational vibrations. Designed as an OEM (Original Equipment Manufacturer) part, the 90109-ZY3-010 ensures seamless integrati