87131-ZW6-B00 Side Mark - Overview. The 87131-ZW6-B00 Side Mark is an essential component in Honda marine engine systems, specifically designed to enhance safety and visibility for boats. As a side marker, it plays a crucial role in illuminating the sides of the vessel, contributing to safer navigation especially in low-light conditions. This part ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine OEM component designed specif