15665-ZY9-000 Oil Level Pipe - Overview. The 15665-ZY9-000 Oil Level Pipe is a critical component of the Honda marine engine's lubrication system. It facilitates accurate measurement of the engine's oil level, ensuring that the engine maintains proper lubrication, which is vital for optimal operation and longevity. This pipe supports the engine oil system and is engineered for seamless integration with existing components, maintaining enhanced performance and durability.. Key Features. Genuine O