Jabsco Profile M Flexible Impeller, 8 Blade, 65 mm Diameter, 5/8 in Shaft Diameter, Brass Insert

Overview

The Jabsco Profile M is a flexible pump impeller range for marine engine cooling, bilge, transfer and general-purpose flexible-impeller pumps. These impellers use an 8-blade flexible rubber rotor with a 65 mm outside diameter and a 16 mm shaft diameter, with variant depths of 36.5 mm, 51 mm and 76.2 mm depending on the pump fit.

This range is built around the same Profile M size family, but the material, drive type and depth vary by configuration. That matters on board because the impeller must match the pump body, shaft drive and liquid being moved. Neoprene versions suit normal engine cooling and fresh or saltwater transfer, while nitrile versions are used where bilge water or transfer fluids may contain oil or diesel.

Key features

• Profile M flexible impeller family with an 8-blade rotor, 65 mm outside diameter and 16 mm shaft diameter.
• Material options include neoprene for engine cooling and fresh or saltwater transfer, plus nitrile for oil or diesel contaminated bilge and transfer duties.
• Drive type options include 3 key drive, 6 ding drive and 7 spline drive, matching different pump shaft hub styles.
• Depth options include 36.5 mm, 51 mm and 76.2 mm, which helps match the impeller to the pump chamber depth.
• Brass insert construction supports the shaft connection inside the flexible rubber impeller body.

Variants

This range changes by material, drive type and depth. Material options include neoprene and nitrile; drive types include 3, 6 and 7; depth options include 36.5 mm, 51 mm and 76.2 mm.

The shared fit points across the Profile M range are the 65 mm outside diameter, 16 mm shaft diameter and 8-blade profile. The selected variant still needs to match the pump drive and impeller depth already used in the pump.

Compatibility and fit

A flexible impeller is a precision fit part, not a general-size replacement. Before fitting, compare the old impeller or pump specification against the material, drive type, outside diameter, shaft diameter and depth. The drive style is especially important because a spline, key or ding drive hub will not interchange correctly with the wrong shaft.

For engine raw-water cooling, the right impeller helps maintain steady coolant flow through the heat exchanger or raw-water circuit. For bilge, transfer and utility pump use, material selection becomes just as important as size because the fluid may contain fuel residue, oil or other contaminants.

Material selection

Neoprene is the common choice for raw-water cooling and clean water transfer on boats, including saltwater service where the pump and system are maintained properly. Nitrile is the better match when the pump may handle oily bilge water, diesel-contaminated water or transfer duties where petroleum exposure is expected.

Installation and maintenance

Install the impeller with the correct vane direction for the pump, using a lubricant that is suitable for rubber impellers. Check the pump cover, cam, wear plate and gasket or O-ring condition while the pump is open, since worn surrounding parts can shorten the service life of a new impeller.

Carry a spare impeller on cruising and fishing boats, especially where engine cooling depends on the raw-water pump. Replace the impeller at regular service intervals or sooner if the vanes show cracking, set, missing tips or heat damage from dry running.