Sierra 18-3421 Mercruiser Water Pump Base
Sierra high-quality engine parts are designed to meet OEM specifications. Water pump base for Mercruiser. Fits 120, 140 & 160 drives with flush screw in gear housing.
Interchangeable with:
Application:
Mercruiser Stern Drive
California Residents: 
WARNING
Cancer and Reproductive Harm -
P65Warnings.ca.gov
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