87131-ZW1-000 Side Mark - Overview. The 87131-ZW1-000 Side Mark is a genuine Honda OEM part used in Honda marine engine systems. This part functions as an identification marker or label attached to the exterior of the marine equipment, supporting the rigging and accessory systems. By providing clear and durable identification, it helps maintain organized, reliable operation of your Honda marine system. Designed to the factory's precise specifications, it guarantees seamless integration with exis