Yamaha - Impeller - 682-44352-03-00Yamaha Impeller Water Pump Component 682 44352 03 00 Overview If theres one part I never ignore on a Yamaha, its the impeller. Its what keeps water moving through the engine, and once it starts wearing out, overheating isnt far behind. Ive pulled plenty of these that looked fine at a glance but werent pushing water like they should. Replacing it on time keeps the cooling system working right and saves you from bigger problems out on the water. Key