Stephill Se34003 Alternator K80C - OEM Number: 028-0009

The Stephill Alternator K80C (OEM 028-0009) is a genuine replacement NSM brushless alternator designed for use on selected Stephill portable petrol generators, including the SE34003S, SE34003SLR, SE3400P and GE3300 models. It is the primary power-generating component within the generator, converting the mechanical output of the engine into stable electrical power for site, industrial, event, and standby applications.

Manufactured to OEM specifications, the NSM K80C alternator is engineered to provide reliable electrical output, smooth waveform characteristics, and long service life in demanding operating environments. Its brushless design helps minimise maintenance requirements while delivering dependable performance under varying load conditions.

FUNCTION AND OPERATION

• Converts engine power into electrical energy
• Provides stable AC power output for tools and equipment
• Supports continuous generator operation under load
• Utilises a brushless design for reduced maintenance
• Delivers smooth waveform electrical output
• Designed for construction, hire fleet, industrial, and standby power applications

TECHNICAL DETAILS

• OEM Part Number: 028-0009
• Type: Generator alternator
• Alternator Model: NSM K80C
• Function: Electrical power generation
• Application: Stephill portable generators
• Design: Brushless smooth waveform alternator
• Construction: Heavy-duty industrial generator alternator
• Installation: Direct OEM replacement for compatible Stephill generator sets
• Alternative Part Number Format: 0280009

TYPICAL APPLICATIONS

Suitable for a range of Stephill generators, including:

• Stephill GE3300 Generator
• Stephill SE34003S Generator
• Stephill SE34003SLR Generator
• Stephill SE3400P Generator
• Portable site generators
• Construction and hire fleet power equipment
• Industrial and standby power generation systems

Stephill parts documentation identifies OEM 028-0009 as the NSM K80C alternator fitted to multiple 3.4kVA generator models powered by the Honda GX200 engine.

IMPORTANT INFORMATION

Always confirm the correct OEM part number, generator model, serial number, voltage configuration, and alternator specification before ordering, as Stephill generators utilise several different alternator designs across their product range. OEM 028-0009 is specifically identified as the NSM K80C brushless alternator used on selected 3.4kVA Stephill generators.

A faulty alternator can cause low voltage output, unstable power generation, intermittent electrical supply, frequency issues, or complete loss of generator output. When replacing the alternator, it is recommended to inspect associated components including the capacitor (OEM 037-0013), diode, alternator mount, cooling fan, end cover, wiring connections, and engine coupling system, as failures in these components can often mimic alternator-related faults. Stephill parts documentation lists the alternator alongside these supporting components within the SE34003 generator assembly.

DELIVERY OPTIONS (UK mainland only)

Next Day Delivery*
£11.95 or FREE for orders over £150
Orders placed before 4pm Monday to Friday will be delivered on the next business day.
Orders placed after 4pm on Friday will be delivered the following Tuesday.
*Next day delivery applies to stocked items only. Availability can be found on the product pages.

Premium Delivery*
£30.00 for delivery before 10:30am
£25.00 for delivery before 12:30pm
*Premium delivery applies to stocked items only. Availability can be found on the product pages.

For all other countries, please click here for full delivery information.

**Separate carriage charges apply to bulk products such as 205L barrels.