12361-ZV0-000 Tappet Room Cover - Overview. The 12361-ZV0-000 Tappet Room Cover is a vital component within Honda marine engine systems. This cover supports the valve system by sealing and protecting the tappet area, which is essential for maintaining proper valve adjustment and lubrication. By preventing debris and contaminants from entering the tappet room, it ensures the smooth operation and longevity of your engine. Designed to match factory specifications, the cover integrates seamlessly wi