Jabsco Impeller Kit - 836-0001-PDescription Jabsco flexible impellers can be fitted to most makes and models of engine cooling water pumps, bilge pumps, transfer and general purpose pumps. Jabsco flexible impellers are subjected to rigorous quality processes to ensure reliable, efficient and long lasting performance. Impeller Replacement: Use Neoprene Impellers for engine cooling, and for fresh or salt water transfer duties Neoprene is the most commonly used material and is suitable