Yuchai
Yuchai YC6T660L-D21
6T
The Yuchai YC6T660L-D21 is a 16.35-litre inline-6 diesel engine for generator sets, rated at 550 kVA / 440 kWe standby power at 1,500 RPM (50 Hz). It is a liquid-cooled engine built in China.
Overhaul & repair parts- Supporting documents
- 1 document · 1 datasheet
- Last updated
- 2026-05-29
- Package route
- diesel generator sets
- Standby Power · 50 Hz
- 550 kVA
- Electrical Output
- 440 kWe
- Cylinders
- L6
- Displacement
- 16.35 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 | |
|---|---|---|---|
| Prime Power | 444.4 | 400 | 500 |
| Standby Power | 488.9 | 440 | 550 |
60 Hz1800 RPM
| kWm | kWe | kVA | |
|---|---|---|---|
| Prime Power | 444.4 | 400 | 500 |
| Standby Power | 488.9 | 440 | 550 |
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Yuchai YC6T660L-D21 overhaul & repair parts
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Yuchai YC6T660L-D21 generator set context
The Yuchai YC6T660L-D21 is listed here as a diesel generator-drive engine for 50 Hz and 60 Hz generator sets, with a headline 550 kVA / 440 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 | Yuchai |
| Model | YC6T660L-D21 |
| Series | 6T |
| Configuration | L6 |
| Cylinders | 6 |
| Displacement | 16.35 L |
| Fuel Type | Diesel |
| Ignition Type | Compression Ignition |
| Cooling Method | Liquid-Cooled |
| Emissions Standard | China National Stage II / Unregulated |
| Country of Origin | China |
Frequently asked questions
What is the power output of the Yuchai YC6T660L-D21?
The Yuchai YC6T660L-D21 is rated at 550 kVA standby / 500 kVA prime at 50 Hz (1,500 rpm); and 550 kVA standby / 500 kVA prime at 60 Hz (1,800 rpm).
Does the YC6T660L-D21 run at 50 Hz or 60 Hz?
The Yuchai YC6T660L-D21 is available for both 50 Hz (1,500 rpm) and 60 Hz (1,800 rpm).
What fuel does the Yuchai YC6T660L-D21 use?
The Yuchai YC6T660L-D21 is a diesel generator-set engine.
What is the displacement and cylinder configuration of the YC6T660L-D21?
The Yuchai YC6T660L-D21 is an inline-6 (6-cylinder) engine with a displacement of 16.35 L.
What is the catalog status of the Yuchai YC6T660L-D21?
The Yuchai YC6T660L-D21 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 YC6T660L-D21?
This page links reference documents for the Yuchai YC6T660L-D21. Check each document's title, model coverage, revision and rating conditions before using it for selection.