91557-ZY9-000 Splash Plate Collar - Overview. The 91557-ZY9-000 Splash Plate Collar is an essential component within Honda marine engine systems. It serves as a protective shield around the splash plate area of outboard motors, ensuring the prevention of water intrusion and safeguarding internal engine components. As a trusted OEM part, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Designed specifically for Honda marine engine