Water Pump Repair Kit. Features: Complete 14-piece water pump repair kit. Produced to Meet Mercury marine original equipment Manufacturer specifications to best protect your older Mercury or Mariner outboard. Designed for durability to provide higher flow rates and cooling flow to protect your engine. Impeller elastomers provide improved flexibility across Broad temperature ranges throughout the boating Season. Kit contains gaskets, O-ring, face plate, impeller, key and water guide tube for easy installation with common tools.