Jabsco Impeller Kit - 9 Blade - Neoprene - 3-¾" Diameter

The Jabsco Impeller Kit – 9 Blade – Neoprene – 3-¾" Diameter (Part No. 836-0001-P) is a replacement flexible impeller assembly designed for marine engine cooling, bilge, transfer, and general-purpose pump applications. This nine-blade neoprene impeller fits most bronze flexible impeller pump models across multiple manufacturers and delivers reliable performance in demanding marine environments where corrosion resistance and consistent flow rates are critical.

The kit features a 3-¾" outer diameter with a 2-½" shaft diameter and 1" shaft width, optimized for spline-drive coupling systems common in marine pump installations. The neoprene blade material provides flexibility under load while resisting degradation from saltwater exposure, antifreeze, and fuel vapors—conditions that degrade less robust elastomers over time. The brass insert adds corrosion resistance in galvanic coupling scenarios and extends service life compared to standard steel inserts. Nine blades offer a balanced design that maximizes displacement and flow efficiency while minimizing cavitation noise in closed-loop cooling circuits.

This Jabsco impeller replacement is essential for owners of recreational vessels, commercial fishing platforms, and marine equipment who rely on engine cooling and bilge pump performance. When cooling flow drops, alternator output declines due to engine temperature rise, and bilge pumps lose effectiveness—both signs of impeller wear. Regular replacement of flexible impeller kits prevents catastrophic cooling system failure and extends engine life, particularly for vessels operating in offshore or brackish-water environments where corrosion accelerates blade deterioration.