90701-HC4-000 Dowel (8X12) Pin - Overview. The 90701-HC4-000 Dowel (8X12) Pin is a critical component within Honda marine engine systems. This cylindrical metal pin, measuring 8mm in diameter and 12mm in length, is designed to provide precise alignment and secure fastening within the engine assembly. By ensuring components fit together accurately, it supports the overall reliability and performance of the Honda marine engine. As an OEM part, it guarantees seamless integration with existing parts