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Add to CartDrive Serial Number Range 2763442 - 6854392 Models which have been retro fitted with an Alpha style ( no preload pin on top of driveshaft) must use Part# 18-3420
Interchangeable with:
California Residents: 
WARNING
Cancer and Reproductive Harm -
P65Warnings.ca.gov
Other Details
Sierra 18-3419 Mercury Water Pump Base Sierra replacement water pump base for Mercury Marine engines. Interchangeable with: GLM 12360 Mallory 9-43307 Mercury...
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Sierra 18-3414 Mercury Water Pump Base Sierra high-quality engine parts are designed to meet OEM specifications. For Mercury Marine applications. Interchangeable...
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Sierra 18-3420 Mercruiser Alpha 1 Water Pump Base Sierra high-quality engine parts are designed to meet OEM specifications. This Water Pump Base fits MR & Alpha One Drives (1985-1990)...
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Sierra 18-3116 Water Pump Housing for Mercury, Mercruiser Sierra high-quality replacement engine parts are designed to meet OEM specifications. For use with 18-3109 Water Tube Guide and...
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Sierra 18-3150 Mercruiser Bravo Water Pump Kit The Sierra 18-3150 Water Pump Kit is for use on all Mercruiser Bravo and TRS Sterndrives and Inboard Marine engines. Can be used to replace the 2 piece...
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Water Pump Kit for Mercury by Sierra Kit Includes: Sie-18-3007 Impeller Sie-18-3118 Upper Pump Housing Sie-18-2945 Drain Gasket Sie-18-2823 Lower Water Pump Base To Face Plate Gasket Sie-18-2824...
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Mercruiser Sea Water Pump for V-8 For V-8 engines with V-Belt and 2 piece pump Replaces: Mercury 46-72774A32 GLM 12093
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