Wärtsilä
Wärtsilä 20V34SG
34SG
Wärtsilä 20V34SG — 726.5 L V20 four-stroke lean-burn spark-ignited gas engine generating set (Wärtsilä 34SG), for power plants. 9795 kWe at 750 rpm / 50 Hz, 9388 kWe at 720 rpm / 60 Hz; electrical efficiency 48.9%.
Overhaul & repair parts- Manufacturer files
- 2 datasheets
- Last updated
- 2026-06-08
- Package route
- gas generator sets
- Prime Power · 50 Hz
- 12,244 kVA
- Electrical Output
- 9,795 kWe
- Cylinders
- V20
- Displacement
- 726.5 L
- Rated Speed
- 750 / 900 RPM
Power Ratings
kWm = mechanical shaft power · kWe = electrical output · kVA = kWe ÷ 0.8 pf
50 Hz750 RPM
| kWm | kWe | kVA | |
|---|---|---|---|
| Prime Power | — | 9795 | 12243.8 |
60 Hz900 RPM
| kWm | kWe | kVA | |
|---|---|---|---|
| Prime Power | — | 9388 | 11735 |
Ask about Wärtsilä 20V34SG
Choose parts / service or sourcing. Your message includes this model and page link.
Wärtsilä 20V34SG overhaul & repair parts
Already running a Wärtsilä 20V34SG? 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 20V34SG and your selected categories included. Attach your photos there.
Wärtsilä 20V34SG generator set context
The Wärtsilä 20V34SG is listed here as a natural gas generator-drive engine for 50 Hz and 60 Hz generator sets, with a headline 12,244 kVA / 9,795 kWe / prime 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 | Wärtsilä |
| Model | 20V34SG |
| Series | 34SG |
| Configuration | V20 |
| Cylinders | 20 |
| Displacement | 726.5 L |
| Fuel Type | Natural Gas |
| Ignition Type | Spark Ignition |
| Cooling Method | Liquid-Cooled |
| Emissions Standard | Unregulated |
| Country of Origin | Finland |
Frequently asked questions
What is the power output of the Wärtsilä 20V34SG?
The Wärtsilä 20V34SG is rated at 12,244 kVA prime at 50 Hz (750 rpm); and 11,735 kVA prime at 60 Hz (900 rpm).
Does the 20V34SG run at 50 Hz or 60 Hz?
The Wärtsilä 20V34SG is available for both 50 Hz (750 rpm) and 60 Hz (900 rpm).
What fuel does the Wärtsilä 20V34SG use?
The Wärtsilä 20V34SG is a Natural Gas generator-set engine.
What is the displacement and cylinder configuration of the 20V34SG?
The Wärtsilä 20V34SG is a V20 (20-cylinder) engine with a displacement of 726.5 L.
What is the catalog status of the Wärtsilä 20V34SG?
The Wärtsilä 20V34SG 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 20V34SG?
This page links reference documents for the Wärtsilä 20V34SG. Check each document's title, model coverage, revision and rating conditions before using it for selection.