Mercury - Quicksilver 817275A5 Water Pump Repair Kit Mercury 3.0L DFI Outboards 817275A5. Overview. Your outboard's water pump is the heart of its cooling system, and keeping it in top shape protects everything else. The Quicksilver 817275A5 Water Pump Repair Kit is built for Mercury 3.0L DFI outboards, giving you all the OEM parts needed to restore full cooling performance.. This complete kit includes the impeller, pump housing, faceplate, gaskets, and O-rings - everything you need to replace w