41148-ZW9-000 Shim C (40MM) - Overview. The 41148-ZW9-000 Shim C (40MM) is a critical component in Honda marine engine systems, supporting the gear and propeller assembly with precision alignment and spacing. As a genuine OEM part, this shim ensures that your marine engine maintains the correct mechanical clearances, contributing to smooth and efficient operation. The 40mm size is designed to meet exact factory specifications, allowing for seamless integration with existing components, thereby m