Jabsco 18653-0001-P Flexible Neoprene Impeller Service Kit

The Jabsco 18653-0001-P neoprene impeller kit is a ten-blade replacement for compatible compact marine water pumps. It uses a brass insert and slotted shaft pin drive, with a nominal 12 mm shaft fitting, 51 mm outside diameter and 22 mm depth.

Technical Data & Parameters

• Manufacturer: Jabsco (Xylem)
• Part number (MPN): 18653-0001-P
• Impeller material: Neoprene
• Jabsco profile: I
• Number of blades: 10
• Outside diameter (A): 51 mm
• Depth (B): 22 mm
• Nominal shaft diameter (C): 12 mm
• Drive type: Slotted shaft pin drive (Jabsco type 1)
• Insert material: Brass

Choosing the Correct Replacement

Check the pump parts schedule for Jabsco 18653-0001 and compare the pin engagement with the removed part. The shaft dimension is listed as 12 mm, or nominally 15/32 inch, in Jabsco's current selection table. Keep the complete part number when ordering workshop or onboard spares.

Similar Impellers: What to Check

The similarly numbered 18673-0001 uses a 12.7 mm half-inch shaft fitting. The 653-0001 shares the nominal 12 mm shaft size and overall dimensions, but has six blades rather than ten. Neither a close part number nor matching outside dimensions confirms interchangeability.

Application & Compatibility

For this impeller, identify compatibility from the complete pump model and its parts schedule. Check the blade count, shaft bore, pin engagement, depth and material together. This is particularly important where a vessel has received a replacement pump during its service life.

Service Kit Selection

This listing is the packaged -P impeller version. Match any supplied gasket or seal to the fitted pump and use only the correct end-cover sealing arrangement. An impeller service pack is not a complete pump overhaul kit: inspect the shaft, cam, cover and seals separately, and order additional worn parts as required.

Why Choose This Impeller?

• Correct replacement specification: The 10-blade configuration and slotted shaft pin drive (jabsco type 1) help identify the required service part.
• Neoprene for water duties: Suitable for fresh and salt water applications where approved for the pump.
• Serviceable component: Replacing the impeller allows a compatible pump to be maintained without automatically replacing the complete assembly.

Installation & Maintenance

Follow the fitted pump's service instructions. Isolate its drive and close the relevant seacock before opening it. Remove the old impeller with a suitable tool, inspect the chamber for wear and recover any missing blade fragments. Fit the correct cover gasket or seal and lubricate the replacement with an installation lubricant approved for the pump and neoprene.

Restore the water supply before starting, then check for leaks and normal water delivery. Avoid dry running. Include the impeller in routine servicing and keep a matching spare available for essential onboard systems.