12341-PNA-000 Cyl Hd Cvr Gasket - Overview. The 12341-PNA-000 Cyl Hd Cvr Gasket is a vital sealing component in Honda marine engine systems. It is specifically designed to prevent oil leaks by creating a tight seal between the cylinder head and its cover, ensuring proper engine compression and reliable performance. This gasket guarantees seamless integration with existing parts, maintaining optimal performance and durability in your marine engine.. Key Features. Genuine OEM cylinder head cover g