Impeller kit – code: 10077K – Onan group

10077K impeller kit for seawater pump (Onan Group)

The impeller kit code 10077K is a dedicated replacement for the maintenance of the sea water pump used on Onan marine generator sets. It is a kit produced by Sherwood (code 10077K) and used as a replacement in Onan/Cummins Onan applications, where the seawater pump plays a central role in the cooling circuit.

In the nautical field, replacing the impeller and associated seals typically falls under scheduled maintenance activities: having a complete kit helps to intervene in an orderly manner, reducing the risk of incomplete reassembly or reuse of seals that are no longer suitable.

Spare part features and details

This item is uniquely identified by replacement code 10077K. The indicated application is on Onan marine generator sets with compatible Sherwood pump.

Technical data confirmed

• Code: 10077K
• Component type: sea water pump impeller kit
• Application: Onan marine generator sets
• Impeller material: neoprene
• Number of blades: 12 blades
• Outer diameter: about 57 mm
• Thickness/width: about 20 mm
• Compatible shaft: about 12.8 mm with keyway drive

Kit contents

The kit 10077K includes:

• 1 neoprene impeller
• 3 seals
• 1 O-ring

Brand and application context

• Brand/application: Onan / Cummins Onan (application on marine generator sets)
• Impeller kit manufacturer: Sherwood (code 10077K), used as a replacement for Onan applications

Applications

The code 10077K is associated with Sherwood seawater pumps also used on generator sets Onan. When sourcing spare parts, identification by code is useful to correctly align kits, installed pump, and group configuration.

Verified application (Onan references provided)

• Onan 132-0379
• Onan 0132-0498
• Onan 0541-1519

Sherwood side references

The kit is also suitable for Sherwood pumps such as:

• N10360GX
• other compatible Sherwood models of the same family

Advantages for maintenance and spare parts management

In a technical context (marine and onboard systems), a complete impeller kit is a practical choice when planning maintenance on the seawater pump.

• Identifiable spare part: the code 10077K facilitates correct warehouse management and order traceability.
• Sealing components included: the presence of gaskets and O-ring supports a reassembly consistent with pump maintenance, avoiding the need to separately source complementary parts.
• More organized intervention: having the main components in a single package reduces the risk of machine downtime due to a missing detail during installation.
• Preventive approach: the replacement of the impeller is normally part of the periodic activities of the seawater pump, especially in marine applications where the reliability of the cooling circuit is a central issue.

Component function in the seawater circuit

The seawater pump impeller is responsible for moving the water necessary for cooling. In particular, the impeller contributes to:

• drawing seawater from the sea intake;
• feeding the cooling circuit of the generator set;
• maintaining proper heat exchange to prevent engine overheating.

For this reason, the kit is normally replaced during the periodic maintenance of the seawater pump.

Usage and important notes

Check before replacement

Before purchase and installation it is necessary to verify the exact model of the generator and of installed pump. Even when Onan and Sherwood references are present, confirmation through code and verification on the pump is a good practice to avoid incompatibilities.

Practical indications for the intervention

• Identification: check the spare part code 10077K and the Sherwood pump references.
• Component check: verify that the kit includes impeller, gaskets, and O-rings as expected.
• Mounting: ensure that the shaft is consistent with the indication about 12.8 mm with keyway drive and that the impeller dimensions correspond to those required by the pump.

Supplier data

• Supplier product code: 10077K

FAQ – Frequently Asked Questions

What is the 10077K impeller kit?

It is a replacement kit for seawater pump, identified by code 10077K, used in applications on Onan marine generator sets with compatible Sherwood pump.

What does the 10077K kit include?

The kit includes 1 neoprene impeller, 3 gaskets, and 1 O-ring.

What are the confirmed technical data of the impeller?

Neoprene impeller with 12 blades, outer diameter about 57 mm, width about 20 mm, and compatible shaft about 12.8 mm with keyway drive.

On which Onan applications is the 10077K code listed?

The Onan references 132-0379, 0132-0498, and 0541-1519 are listed, associated with Sherwood seawater pumps that use the 10077K kit.

Do I need to check compatibility before purchase?

Yes. Before replacement, it is necessary to verify the exact model of the generator and the installed pump, comparing codes and pump characteristics.