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Mercruiser Pre-Alpha Water Pump Housing Kit by Sierra
18-3109 - Water Tube 18-3017 - Impeller 18-3116 - Housing 18-2919 - Water Pump Base to Gear Housing Gasket 18-3417 - Water Pump Base 18-3110 - Grommet 18-2945 - Gear Housing Drain Screw Gasket 18-2826 - Water Pump Base to Gear Housing Gasket 18-2914 - Lower Water Pump to Wear Plate Gasket 18-2915 - Upper Water Pump to Wear Plate Gasket 18-2944 - Seal Ring 18-3117 - Plate 18-7158 - O-Ring 18-7162 - O-Ring 18-7173 - O-Ring 18-7176 - O-Ring 18-2801 - Water Pump Gasket 18-7196 - O-Ring 18-7426 - O-Ring 18-2919 - Water Pump Gasket
For #1/R Units without flush S/N 2763442 - 6854392 Pre-Alpha Mercruiser Drives. Models which have been retro fitted with an Alpha style ( no preload pin on top of driveshaft) must use Kit # 18-3320.