Sierra's 18-3319 Water Pump Kit is designed for use with Mercury/Mariner outboard engines. The kit contains: (1) Sierra 18-2801 Water Pump Gasket, (1) Sierra 18-2826 Water Pump Base Gasket, (1) Sierra 18-2914 Water Pump Gasket, (1) Sierra 18-2915 Water Pump Gasket, (1) Sierra 18-2919 Water Pump Gasket, (1) Sierra 18-2944 Seal Ring, (2) Sierra 18-2945 Drain Screw Gaskets, (1) Sierra 18-3017 Impeller, (1) Sierra 18-3109 Water Tube Guide, (1) Sierra 18-3116 Water Pump Housing, (1) Sierra 18-3117 Impeller Plate, (1) Sierra 18-3419 Water Pump Base, (1) Sierra 18-7158 O-Ring, (1) Sierra 18-7162 O-Ring, (1) Sierra 18-7173 O-Ring, (1) Sierra 18-7176 O-Ring, (1) Sierra 18-7426 O-Ring, and (1) O-Ring. It is interchangeable with Mallory 9-48306; Mercruiser Stern Drive 46-32437A3, 46-37433A1, and 96-96148A8; and Mercury Marine 46-32437A1, 46-37433A1, 46-42579A4, 46-44292A4, 46-48747A3, 46-57234A3, 46-58618A4, 46-60367A1, 46-60367A4, 46-64141A11, 46-69222A3, 46-73802A3, 46-73804A3, 46-78400A2, 46-96148A5, and 46-96148A8. Each Sierra product meets or exceeds the original equipment part it replaces. Fit specific, check part numbers to ensure proper fit.