Sierra International 18-3448 Water Pump Kit Sierra Water Pump Kit Meets or exceeds the original equipment quality Sierra part number: 18-3448 Interchangeable with the following: Mercury 46-48744A3 Contains: 18-2827 Upper Face Plate Gasket, 18-2828 Lower Water Pump Gasket, 18-2829 Water Pump Gasket, 18-3052 Impeller