99001-14170 Spanner (14X17) - Overview. The 99001-14170 Spanner (14X17) is a high-quality, genuine Honda tool designed specifically for marine engine systems maintenance. As an OEM component, it plays a crucial role in tightening and loosening nuts and bolts sized 14mm by 17mm, ensuring precise adjustments within the Honda marine engine system. Its robust construction and exact factory specifications guarantee seamless integration with existing parts, maintaining optimal performance and durabili