90551-ZY3-000 Shim D (2.90) - Overview. The 90551-ZY3-000 Shim D (2.90) is a thrust shim precisely designed for Honda marine engine systems. It functions as a washer or spacer with a thickness of 2.90 millimeters and is used to adjust clearances between critical components in the propeller shaft assembly or related drive systems. By maintaining accurate spacing and alignment, it ensures smooth mechanical motion and optimized performance, helping your marine engine operate reliably and efficientl