Mercruiser 46-807151A9 Original Raw Water Pump for Serpentine Belt Applications. Used on later Mercruiser Bravo and Mercruiser Inboards with SERPENTINE Belt/Pullies. (wide flat belt). Pump is supplied with Serpentine Pulley.
For replacement impeller order # 18-3087 1-piece plastic impeller housing order # 18-3150.