Impeller Replacement Kit A worn or damaged impeller can cause system failure or engine breakdown. Johnson Pump brand impellers are developed and manufactured for maximum flow and long life. With a genuine spare impeller from Johnson Pump, you can also be sure that you are getting the quality required by engine manufacturers and professionals. Johnson Pump: 09-703B-1 Mercruiser: 47-59362T Jabsco: 17954-0001 Engine/Pumps: Pump Quicksilver Model 46-72774 A32