41146-ZW9-000 Shim A (40MM) - Overview. The 41146-ZW9-000 Shim A (40MM) is a precision metal spacer specifically designed for Honda marine engine systems. It plays a crucial role in supporting the propeller shaft assembly by maintaining exact spacing and alignment within the gear case. This spacer ensures seamless mechanical fit and smooth operation of the drive system, critical for reliable engine performance.. Key Features. An OEM genuine Honda part ensuring exact factory specifications, dimensions, and tolerances.. Functions as a precision shim to maintain proper clearance and alignment in the propeller shaft system.. Integrates cleanly with existing propeller shaft hardware and seals to preserve system integrity.. Helps optimize mechanical motion and reduce wear within the gear case assembly.. Supports consistent and reliable engine output by preventing misalignment-related stresses.. OEM-style design promotes expected durability, performance, and operational feel.. Why Choose Genu