50514-ZW9-000 Reverse Lock Spring - Overview. The 50514-ZW9-000 Reverse Lock Spring is an essential component within Honda marine engine systems, specifically designed for the reverse lock mechanism. This spring plays a critical role in maintaining proper tension to ensure secure engagement and disengagement of the reverse gear, providing a reliable and safe boating experience. Its design supports system integrity by preventing accidental shifting and ensures seamless integration with other hard