87539-ZW6-740 Exhaust Caution Mark - Overview. The 87539-ZW6-740 Exhaust Caution Mark is a vital safety component designed for Honda marine exhaust system applications. It serves as a visual warning label to alert operators of hot exhaust surfaces, preventing burns and injuries during operation and maintenance. This genuine Honda marine part ensures seamless integration with exhaust components, maintaining optimal performance and durability in marine engine systems.. Key Features. High-quality c