Johnson Pump Talulah High Flow Ballast Pump Impeller Kit [09-849P-2]Talulah High Flow Ballast Pump Impeller Kit For the well being of your boat engine your water cooling pump must be able to supply a minimum specified continuous flow of cooling water. The flexible impeller in your pump, which provides this pumping action, is a wear part. Over time the impeller will lose its ability to maintain the pressure needed for the flow of cooling water and must be replaced. A good quality impeller will provide you with many