90111-ZY6-U11 Stopper Bolt - Overview. The 90111-ZY6-U11 Stopper Bolt is a critical fastener in Honda marine engine systems. It supports the mechanical assembly by acting as a stopper or securing bolt within the engine rigging and accessory systems. By meeting factory specifications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Designed specifically for Honda marine engine rigging and accessories system.. Genuine OEM componen