28443-ZW9-003 Return Spring - Overview. The 28443-ZW9-003 Return Spring is a vital component in Honda marine engine systems. It supports the throttle and shift linkage system, enabling smooth operation and precise retraction of control linkages to maintain reliable engine performance. Engineered as an OEM (Original Equipment Manufacturer) part, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Provides essential return action for