23172-ZVL-B13 Mount Case Gasket - Overview. The 23172-ZVL-B13 Mount Case Gasket is a critical sealing component within Honda marine engine systems. It is responsible for maintaining a watertight seal around the engine's mount case, preventing water ingress and protecting vital internal parts. Designed to meet factory specifications, this gasket ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Gasket providing a reliable seal for the mount case system.. OEM genuine Honda component engineered for durability and performance.. Prevents water ingress to protect engine internal components.. Manufactured to meet exact Honda factory specifications, dimensions, and tolerances.. Ensures clean integration with existing mounting hardware and seals.. Maintains original equipment feel and performance, securing mechanical integrity.. Why Choose Genuine OEM. Using original Honda parts like the 23172-ZVL-B13 Mount Case Gasket preserves the