14526-ZY3-405ZA Base *NH8* - Overview. The 14526-ZY3-405ZA Base *NH8* is a critical component supporting your Honda marine engine system, specifically functioning as the timing belt tensioner base. Its role is to maintain accurate tension on the timing belt, which ensures the smooth synchronization of engine components for reliable operation. Designed to integrate seamlessly with Honda marine engines, it ensures optimal performance and longevity while maintaining precise fit with existing parts