Jabsco 18777-0001-P Flexible Neoprene Impeller Service Kit

The Jabsco 18777-0001-P neoprene impeller kit is a ten-blade replacement for compatible marine water pumps. Its 57 mm diameter and 51 mm depth create a distinct configuration within the Jabsco range, with a brass splined hub engaging the specified 16 mm shaft.

Technical Data & Parameters

• Manufacturer: Jabsco (Xylem)
• Part number (MPN): 18777-0001-P
• Impeller material: Neoprene
• Jabsco profile: HH
• Number of blades: 10
• Outside diameter (A): 57 mm
• Depth (B): 51 mm
• Nominal shaft diameter (C): 16 mm
• Drive type: Spline drive
• Insert material: Brass

Choosing the Correct Replacement

Use this impeller when the pump documentation specifies Jabsco 18777-0001. Jabsco also identifies the newer 18777 series as a possible replacement for the 22120 series in its selection guide. Check the full pump specification before applying that replacement guidance to an existing installation.

Similar Impellers: What to Check

The 17937 family has ten blades and the same nominal depth and spline size, but is larger at 65 mm diameter. The 3085 family has a 57 mm diameter and ten blades, but is shallower at 31.8 mm. Checking all three dimensions prevents these visually similar parts being confused.

OEM References & Cross-References

Jabsco lists the following reference numbers for this impeller family:

• Ancor: J050022
• CEF: 500104
• Volvo Penta: 834794, 876120-7

Use these numbers to identify the original impeller, then confirm the pump model and current replacement specification. An engine brand alone does not establish compatibility.

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 spline drive 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.