Johnson Pump General Purpose, Engine Cooling Pedestal pump, F7b-8, 1" NPT ports, 5/8" shaft self-priming general purpose flexible impeller bronze pump. Replaces the Jabsco 777-9001. This compact, multipurpose bronze pump has great self-priming capabilities. The general purpose pump has flexible impeller engine cooling. Perfect for marine engines, bilge pumps, freshwater pumps, deckwash pumps, fuel transfer pumps, and more.