Sierra International 18-3577-1 Marine Bi-Directional Circulating Water Pump - High Performance Boat & Yacht Water Circulation System for Engine Cooling & Bilge Pumping
Had to replace an old but still functional water pump on a 1993 Mercruiser 7.4 liter 454 big block. This was an exact match. Well packaged, no score marks on gasket surfaces. Included installed brass fitting for by-pass to manifold. Pully fits perfectly. No complaints.