90519-ZW1-B00 Gear (0.15) Shim B - Overview. The 90519-ZW1-B00 Gear (0.15) Shim B is a critical component within Honda marine engine systems. This 0.15mm thick gear shim supports the gear assembly system by ensuring precise spacing and alignment of gears, which is essential for smooth and efficient mechanical motion. By maintaining the correct clearance between gears, it helps prevent premature wear and promotes longevity of the engine components. Designed as a genuine OEM part, it matches Honda