90756-ZW1-003 Dowel Pin - Overview. The 90756-ZW1-003 Dowel Pin is a critical hardware component used in Honda marine engine systems. It functions as a precise locating and aligning element between parts within the engine assembly, ensuring structural integrity and reliable operation. Designed specifically for the gear case and extension case systems, this genuine OEM pin dowel maintains factory specifications, dimensions, and tolerances, allowing seamless integration with existing parts and mai