Mesa
Mesa GX22
PowerCore
Mesa GX22 — 21.9 L V12 (128 × 142 mm, 4 valves/cyl, ~20% more power) EPA-certified spark-ignited natural-gas / propane generator engine, built on a Hyundai block. Up to 540 kW standby (60 Hz) / 478 kW (50 Hz); engine output 612 kW (684 hp) at 60 Hz.
Overhaul & repair parts- Manufacturer files
- No datasheet
- Last updated
- 2026-06-11
- Package route
- gas generator sets
- Standby Power · 50 Hz
- 598 kVA
- Electrical Output
- 478 kWe
- Cylinders
- V12
- Displacement
- 21.9 L
- Rated Speed
- 1,500 / 1,800 RPM
Power Ratings
kWm = mechanical shaft power · kWe = electrical output · kVA = kWe ÷ 0.8 pf
50 Hz1500 RPM
| kWm | kWe | kVA | |
|---|---|---|---|
| Standby Power | — | 478 | 597.5 |
60 Hz1800 RPM
| kWm | kWe | kVA | |
|---|---|---|---|
| Prime Power | — | 491 | 613.6 |
| Standby Power | — | 540 | 675 |
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Mesa GX22 overhaul & repair parts
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Mesa GX22 generator set context
The Mesa GX22 is listed here as a natural gas generator-drive engine for 50 Hz and 60 Hz generator sets, with a headline 598 kVA / 478 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 | Mesa |
| Model | GX22 |
| Series | PowerCore |
| Configuration | V12 |
| Cylinders | 12 |
| Displacement | 21.9 L |
| Fuel Type | Natural Gas |
| Ignition Type | Spark Ignition |
| Cooling Method | Liquid-Cooled |
| Emissions Standard | U.S. EPA Stationary |
| Certifications | EPA |
| Country of Origin | United States |
Frequently asked questions
What is the power output of the Mesa GX22?
The Mesa GX22 is rated at 598 kVA standby at 50 Hz (1,500 rpm); and 675 kVA standby / 614 kVA prime at 60 Hz (1,800 rpm).
Does the GX22 run at 50 Hz or 60 Hz?
The Mesa GX22 is available for both 50 Hz (1,500 rpm) and 60 Hz (1,800 rpm).
What fuel does the Mesa GX22 use?
The Mesa GX22 is a Natural Gas generator-set engine.
What is the displacement and cylinder configuration of the GX22?
The Mesa GX22 is a V12 (12-cylinder) engine with a displacement of 21.9 L.
What emissions information is listed for the GX22?
This record lists U.S. EPA Stationary for the Mesa GX22. 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 Mesa GX22?
The Mesa GX22 is marked active in this database. Confirm current production and availability with the manufacturer; catalog status is not a live supply check.