Johnson Pump Impeller - Nitrite (F5B) With Glycerine QS24 Both the 147cm and 180cm

Both the 147cm and 180cm models have a 25mm-diameter pole

one for bowl emptying and the other for emptying and flushing

Whether you're protecting above or below the waterline

A: 2 1/4" (57mm)

Johnson Pump Impeller - Nitrite (F5B) With Glycerine QS24 Both the 147cm and 180cmJohnson Pump Impeller Nitrite (F5B) With Glycerine. Ref19: AF 09 1027B 9 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