Yamaha - Water Pump Repair Kit Cooling System Service Kit 6EE-W0078-00-00. Overview. The Yamaha Water Pump Repair Kit 6EE-W0078-00-00 is one of those maintenance kits that keeps small four-stroke motors running cool and reliable. On engines like the F4 and F6, even a slight drop in water flow can show up fast, especially at idle. This kit gives you everything needed to rebuild the pump and restore proper cooling performance. If you're doing routine service or fixing weak water pressure, this is the kind of kit you want on hand.. Key Features. • Complete Pump Rebuild Kit - Includes housing, impeller, gaskets, and internal components for a full service.. • OEM Fit Precision - Built to Yamaha specifications for proper alignment and dependable installation.. • Restores Cooling Performance - Helps bring back strong water flow and stable engine temperatures.. • Durable Marine Components - Designed to handle heat, friction, and continuous water exposure.. Engine & Boat Compatibility. • F4 Pre