Generac
Generac QT025A
QuietSource
Generac QT025A is a 2.4 L inline-4 naturally aspirated gaseous engine generator rated 25 kWe standby at 1800 RPM on natural gas or propane vapor. Generac lists EPA stationary-emergency certification, and EPA annual data lists a 38.6 kWm node. The 6.8 L displacement shown on one 2024 EPA row is a source error.
Overhaul & repair parts- Manufacturer files
- 1 datasheet
- Last updated
- 2026-07-25
- Package route
- gas generator sets
- Standby Power · 60 Hz
- 31 kVA
- Electrical Output
- 25 kWe
- Cylinders
- L4
- Displacement
- 2.4 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 | |
|---|---|---|---|
| Standby Power | — | 25 | 31.25 |
Ask about Generac QT025A
Choose parts / service or sourcing. Your message includes this model and page link.
Generac QT025A overhaul & repair parts
Already running a Generac QT025A? Start with the parts you need, then send your nameplate so we can help check the right references for your engine.
Start with engine identification
We do not have a reviewed public parts preview for this model yet. Send the engine details and tell us what needs repair.
Let’s identify the right parts.
The model is the starting point. Serial numbers and build configurations can change which parts fit.
- Take a clear photo of the engine nameplate.
- Tell us what needs repair or replacement.
- Send both in WhatsApp to start a fitment check.
Opens WhatsApp with QT025A and your selected categories included. Attach your photos there.
Generac QT025A generator set context
The Generac QT025A is listed here as a natural gas generator-drive engine for 60 Hz generator sets, with a headline 31 kVA / 25 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.
Also searched as
Technical Specifications
| Brand | Generac |
| Model | QT025A |
| Series | QuietSource |
| Configuration | L4 Naturally Aspirated |
| Cylinders | 4 |
| Displacement | 2.4 L |
| Compression Ratio | 9.5:1 |
| Fuel Type | Natural Gas |
| Ignition Type | Spark Ignition |
| Cooling Method | Liquid-Cooled |
| Emissions Standard | U.S. EPA Stationary |
| Certifications | U.S. EPA Stationary Emergency |
| Country of Origin | United States |
Frequently asked questions
What is the power output of the Generac QT025A?
The Generac QT025A is rated at 31 kVA standby at 60 Hz (1,800 rpm).
Does the QT025A run at 50 Hz or 60 Hz?
The Generac QT025A is rated for 60 Hz (1,800 rpm).
What fuel does the Generac QT025A use?
The Generac QT025A is a Natural Gas generator-set engine.
What is the displacement and cylinder configuration of the QT025A?
The Generac QT025A is an inline-4 (4-cylinder) engine with a displacement of 2.4 L.
What emissions information is listed for the QT025A?
This record lists U.S. EPA Stationary for the Generac QT025A. 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 QT025A?
The Generac QT025A 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 QT025A?
This page links reference documents for the Generac QT025A. Check each document's title, model coverage, revision and rating conditions before using it for selection.