90055-ZY3-000 Bolt Tensioner - Overview. The 90055-ZY3-000 Bolt Tensioner is a crucial component in Honda marine engine systems. This tensioner bolt plays a vital role in securing and adjusting the tensioner assembly, which helps maintain proper belt tension within the engine system. By sustaining the correct tension, it ensures smooth mechanical operation, reducing wear and enhancing reliability. Designed as a genuine OEM part, it ensures seamless integration with existing parts, maintaining op