Mercury - Water Pump Repair Kit Cooling System Service Complete 7-Piece Kit 89980T1. Overview. Running a vintage Mercury or Mariner outboard has its own kind of satisfaction - that familiar tone, the light weight, the simplicity. But even the most reliable old two-stroke needs proper cooling to stay healthy. The Quicksilver 89980T1 Water Pump Repair Kit gives these classic 3.5-9.8 horsepower engines the fresh start they deserve. When your pump is rebuilt with the right parts, you feel it right a