Water Pump Impeller Kit – Fits Yamaha 25HP-40HP (Replaces 66T-W0078-A0, 18-3432, 89890) 180-435HP sandy or saltwater environments may

sandy or saltwater environments may require more frequent changes)

inconsistent color dispersion

Reconnect the battery and test the sterndrive's function in the water

but be careful not to damage the pump or pulley

Sierra 18-3386

Water Pump Impeller Kit – Fits Yamaha 25HP-40HP (Replaces 66T-W0078-A0, 18-3432, 89890) 180-435HP sandy or saltwater environments mayProduct Details This aftermarket Water Pump Impeller Kit Fits Yamaha 25HP 40HP Outboards (Replaces 66T W0078 A0) is designed for a wide range of Yamaha 2 Stroke and 4 Stroke outboard engines from 25HP to 40HP, covering models manufactured between 1993 and 2006. It serves as a direct interchange for Yamaha OEM part numbers 66T W0078 A0, 66T W0078 A0 00, 66T W0078 00 00, and 66T W0078 01 00, as well as aftermarket cross references like Sierra 18 3432