12391-881-000 Head Cover Gasket - Overview. The 12391-881-000 Head Cover Gasket is an essential part of the Honda marine engine systems. It functions as a reliable seal between the cylinder head and the head cover, preventing leaks that can compromise engine performance. By maintaining this tight seal, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Designed specifically for Honda marine engines, ensuring proper fit and function.. Serves as a seal to prevent oil and fluid leaks between the cylinder head and head cover.. Manufactured to factory-original specifications to match precise dimensions and tolerances.. Constructed from durable materials that withstand marine environment stresses and engine heat.. Ensures stable engine operation by maintaining proper sealing and preventing contamination.. OEM style guarantees compatibility with existing engine hardware and seals.. Why Choose Genuine OEM. Using original Honda pa