28437-ZV4-003 Stopper Spring - Overview. The 28437-ZV4-003 Stopper Spring is an essential component within Honda marine engine systems. This spring supports the rigging system, helping maintain tension and proper positioning to keep marine controls and mechanisms operating reliably. It is specifically designed to integrate seamlessly within the marine propulsion or control mechanism, ensuring smooth and consistent function.. Key Features. Genuine OEM Honda part made to exact factory specificatio