A well-functioning water pump is the heart of an outboard's cooling system, keeping engine temperatures in check and performance at its peak. The Yamaha Water Pump Repair Kit (6AH-W0078-02-00) includes everything needed to restore proper water circulation, ensuring your outboard runs cool and efficiently. Over time, impellers wear down and seals degrade, which can lead to overheating and serious engine damage-this kit is the solution to keeping your cooling system in top shape.. What Makes This Kit Essential?. Complete Pump Rebuild - Includes an impeller, gaskets, O-rings, and seals for a full water pump overhaul.. Reliable Cooling Performance - Maintains optimal water flow to prevent overheating and protect engine components.. OEM-Grade Durability - Genuine Yamaha parts ensure a precise fit and long-lasting performance in harsh marine conditions.. Ideal For:. Routine Maintenance - Recommended as part of your scheduled service to extend engine life and prevent cooling failures.. Troubl