Waukesha
Waukesha JZ
Early Historical Waukesha Model Series
Waukesha JZ discontinued early historical engine model series. The Waukesha Engine Historical Society production table lists this model series from 1931 to 1934; 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.
Overhaul & repair parts- Manufacturer files
- 1 datasheet
- Last updated
- 2026-08-12
- Package route
- gas generator sets
- Cylinders
- L4
- Rated Speed
- 1,500 RPM
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Waukesha JZ overhaul & repair parts
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Waukesha JZ generator set context
The Waukesha JZ 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 | JZ |
| 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 1934 |
| Certifications | Waukesha Engine Historical Society production table, Waukesha Engine Historical Society model-designation guide |
| Country of Origin | United States |
| Year Introduced | 1931 |
| Year Discontinued | 1934 |
Frequently asked questions
What fuel does the Waukesha JZ use?
The Waukesha JZ is a Gasoline generator-set engine.
What is the cylinder configuration of the JZ?
The Waukesha JZ is an inline-4 (4-cylinder) engine.
What emissions information is listed for the JZ?
This record lists Historical production ended 1934 for the Waukesha JZ. Confirm the exact engine family, model year, configuration and applicable manufacturer certification documents before specifying it for a regulated project. A database label does not establish certification of a complete generator package.
Is the JZ still in production?
No — the Waukesha JZ is discontinued (production ended around 1934). Its specifications and datasheets remain archived here for reference.
Are reference documents available for the JZ?
This page links reference documents for the Waukesha JZ. Check each document's title, model coverage, revision and rating conditions before using it for selection.