New Mercury & Mariner Gearcase Water Pump Housings and Bases

This page highlights pump housings and bases tailored for Mercury & Mariner outboard water pumps, including OEM replacements like the Mercury & Mariner V6 Water Pump Base (# 46‑42579A3) or aftermarket parts from trusted brands such as Red Rhino, Sierra, and RecMar. Built for durability and a perfect fit, these housings and bases support efficient engine cooling and protect against overheating. Ideal for marine professionals and enthusiasts, OBParts offers top-quality water pump housings—whether you're restoring classic models or maintaining a modern outboard—with reliable performance and OEM precision.