Jabsco Impeller Kit - 12 Blade - Neoprene - 2-7/16" Diameter

The Jabsco Impeller Kit - 12 Blade - Neoprene - 2-7/16" Diameter (MPN: 18838-0001-P) is a marine-duty flexible impeller assembly engineered for raw-water circulation systems in inboard and outboard engines. Built for mechanics and boat owners who demand reliable cooling performance, this impeller kit replaces worn or damaged impellers in Jabsco-equipped marine cooling circuits. Whether you're performing routine maintenance on a cabin cruiser or restoring a vintage runabout, this replacement kit delivers OEM-quality performance at the heart of your engine's thermal management system.

The 12-blade neoprene design flexes against the pump housing cam ring as the shaft rotates, creating positive displacement that moves water without cavitation or excessive wear on soft components. The neoprene material withstands saltwater and freshwater exposure while maintaining elasticity across typical engine operating temperatures, and the brass insert hub provides corrosion resistance and secure key-drive engagement. At 2-7/16 inches in diameter with a 1-1/4 inch shaft and 5/8 inch shaft width, this impeller integrates seamlessly into standard Jabsco pump housings, ensuring precise fit and reliable priming during cold starts or after maintenance shutdowns.

Technicians and DIY mechanics benefit most from keeping this kit on hand for preventive maintenance intervals, typically every 5 years or 500 operating hours depending on water quality and usage. Impeller degradation reduces cooling efficiency and risks engine overheating, making prompt replacement critical for extended cruising or commercial applications. This kit fits Jabsco flexible impeller pumps used across Mercury, Crusader, OMC, and other inboard engines where raw-water cooling is essential; verify your pump housing model before ordering to ensure compatibility with this standard 12-blade configuration.