Mercury - Water Pump Base Cooling System Reinforced Nylon 96146A6. Overview. When you run a V-175 Mercury outboard, you get used to the steady hum of a strong, confident engine. It's a sound you trust-whether you're skimming across glass-still morning water or pushing home through a late-day chop. But that calm, consistent performance depends heavily on one thing: a cooling system you can count on. The Quicksilver 96146A6 Water Pump Base helps restore that dependability by giving your outboard a