Generac
Generac SG250
SG Series
Generac SG250 14.2 L inline-6 turbocharged and aftercooled spark-ignited natural-gas generator engine. Generac publishes 375 hp standby and 337 hp prime at 1800 RPM, producing 250 kWe standby and 225 kWe prime.
Overhaul & repair parts- Manufacturer files
- 1 datasheet
- Last updated
- 2026-07-25
- Package route
- gas generator sets
- Standby Power · 60 Hz
- 313 kVA
- Electrical Output
- 250 kWe
- Cylinders
- L6
- Displacement
- 14.2 L
- Rated Speed
- 1,800 RPM
Power Ratings
kWm = mechanical shaft power · kWe = electrical output · kVA = kWe ÷ 0.8 pf
60 Hz1800 RPM
| kWm | kWe | kVA | |
|---|---|---|---|
| Prime Power | 251 | 225 | 281 |
| Standby Power | 280 | 250 | 313 |
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Generac SG250 overhaul & repair parts
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Generac SG250 generator set context
The Generac SG250 is listed here as a natural gas generator-drive engine for 60 Hz generator sets, with a headline 313 kVA / 250 kWe / standby rating. 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 | Generac |
| Model | SG250 |
| Series | SG Series |
| Configuration | L6 Turbocharged Aftercooled |
| Cylinders | 6 |
| Displacement | 14.2 L |
| Fuel Type | Natural Gas |
| Ignition Type | Spark Ignition |
| Cooling Method | Liquid-Cooled |
| Emissions Standard | U.S. EPA Stationary |
| Certifications | U.S. EPA Stationary Emergency, U.S. EPA Stationary Non-Emergency |
| Country of Origin | United States |
Frequently asked questions
What is the power output of the Generac SG250?
The Generac SG250 is rated at 313 kVA standby / 281 kVA prime at 60 Hz (1,800 rpm).
Does the SG250 run at 50 Hz or 60 Hz?
The Generac SG250 is rated for 60 Hz (1,800 rpm).
What fuel does the Generac SG250 use?
The Generac SG250 is a Natural Gas generator-set engine.
What is the displacement and cylinder configuration of the SG250?
The Generac SG250 is an inline-6 (6-cylinder) engine with a displacement of 14.2 L.
What emissions information is listed for the SG250?
This record lists U.S. EPA Stationary for the Generac SG250. 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.
What is the catalog status of the Generac SG250?
The Generac SG250 is marked active in this database. Confirm current production and availability with the manufacturer; catalog status is not a live supply check.
Are reference documents available for the SG250?
This page links reference documents for the Generac SG250. Check each document's title, model coverage, revision and rating conditions before using it for selection.