23172-ZW5-013 Mount Case Gasket - Overview. The 23172-ZW5-013 Mount Case Gasket is a crucial component within Honda marine engine systems. It supports the sealing system by creating a watertight barrier between the mount case and adjoining parts, preventing water ingress and protecting internal engine components. Engineered to meet exact factory specifications, this gasket ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. OEM Genuine Honda part designed specifically for Honda marine engines.. Provides a reliable, watertight seal to prevent water leaks and engine damage.. Engineered to factory dimensions and tolerances for precise fit and easy installation.. Enhances engine longevity by maintaining integrity of the mount case assembly.. Integrates cleanly with existing hardware, seals, and housings for smooth operation.. Ensures durability and performance consistent with original equipment standards.. Why Choose Genuine OEM.