15140-PH3-000 Oil Control Orifice - Overview. The 15140-PH3-000 Oil Control Orifice is a critical component within Honda marine engine oil systems. It is engineered to regulate oil flow precisely, supporting the lubrication system to ensure reliable engine operation. By maintaining controlled oil pressure and flow, it safeguards engine components from wear and overheating, thus enhancing engine longevity. Precision-made to meet Honda's rigorous factory specifications, this oil control orifice se