Waukesha
Waukesha JS
Early Historical Waukesha Model Series
Waukesha JS discontinued early historical engine model series. The Waukesha Engine Historical Society production table lists this model series from 1926 to 1936; its model-designation guide explains the early letter, six-cylinder, and F-head naming schemes used by these rows. This supports a source-validated legacy page for owners searching parts, service, restoration, and overhaul information.
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- Manufacturer files
- 1 datasheet
- Last updated
- 2026-08-12
- Package route
- gas generator sets
- Cylinders
- L4
- Rated Speed
- 1,500 RPM
Waukesha JS generator set context
The Waukesha JS is listed here as a gasoline generator-drive engine for 50 Hz generator sets. Use this page to compare the published engine output, electrical kWe/kVA ratings, emissions level, datasheet availability, and neighboring models before specifying an alternator, controller, enclosure, voltage, and compliance package.
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Technical Specifications
| Brand | Waukesha |
| Model | JS |
| Series | Early Historical Waukesha Model Series |
| Configuration | Inline-4 gasoline engine model series |
| Cylinders | 4 |
| Fuel Type | Gasoline |
| Ignition Type | Spark Ignition |
| Cooling Method | Liquid-Cooled |
| Emissions Standard | Historical production ended 1936 |
| Certifications | Waukesha Engine Historical Society production table, Waukesha Engine Historical Society model-designation guide |
| Country of Origin | United States |
| Year Introduced | 1926 |
| Year Discontinued | 1936 |
Frequently asked questions
What fuel does the Waukesha JS use?
The Waukesha JS is a Gasoline generator-set engine.
What is the cylinder configuration of the JS?
The Waukesha JS is an inline-4 (4-cylinder) engine.
What emissions standard does the JS meet?
The Waukesha JS is certified to Historical production ended 1936 emissions standards.
Is the JS still in production?
No — the Waukesha JS is discontinued (production ended around 1936). Its specifications and datasheets remain archived here for reference.
Is a datasheet available for the JS?
Yes — an official Waukesha datasheet for the Waukesha JS can be downloaded from this page.