Mercury - Water Pump Repair Kit Cooling System Component 40-70HP 2-Stroke Outboards 60366T1. Overview. A well-functioning water pump keeps your outboard cool and running at its best. The Mercury Marine 60366T1 Water Pump Repair Kit gives older Mercury and Mariner 40-70HP 2-stroke outboards the refresh they need to maintain consistent cooling flow. This complete upper repair kit includes the impeller, key, gaskets, o-ring, plates, and molded upper housing - everything required to restore your pum