91212-ZW5-003 Oil Seal (40x52x7) - Overview. The 91212-ZW5-003 Oil Seal (40x52x7) is a critical component in Honda marine engine systems. This oil seal serves as a precise barrier that prevents oil leakage from moving engine parts, maintaining seamless engine operation and protecting the integrity of the lubrication system. Designed to fit Honda marine engines with exact dimensions of 40x52x7 millimeters, it ensures seamless integration with existing parts, maintaining optimal performance and du