90511-ZW4-000 Shim A (2.45) - Overview. The 90511-ZW4-000 Shim A (2.45) is a specialized shim designed for use in Honda marine engine systems. This component plays a critical role in maintaining precise component spacing and alignment within the mechanical assemblies of Honda engines, ensuring smooth and reliable operation. Crafted to meet exact factory specifications, the shim is essential for keeping the engine running at optimal performance levels.. Key Features. Precision shim with 2.45mm th