Jabsco 17018-1101 Neoprene Impeller replaces the following The Jabsco 17018-1101 flexible neoprene impeller has 8 impeller blades, and a splined drive. The Jabsco neoprene flexible impellers are used for pumping fresh or salt water, neoprene impellers are the most commonly used material and is suitable for use where only small amounts of oil or diesel fuel are present.