Engine family
Weichai and Baudouin generator engines: who makes them, the ranges, and how to check them
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Sinospect supplies generating sets from China with the engine series on the quotation and the maker and plant in the order contract, and checks each engine’s dataplate against the order before it ships. To have an offer checked, send it: we reply with what the review would cover and any fee, before paid work begins. Send the offer you want checked →
One group, two engine brands
Weichai Power Co., Ltd. was founded in 2002 with the former Weifang Diesel Engine Works as its main promoter, and was the first Chinese engine maker listed in Hong Kong (Weichai Power). Baudouin, founded in Marseille in 1918, went into receivership at the end of 2008 and was bought by Weichai Power in January 2009 (Baudouin; Weichai). Baudouin launched its PowerKit generator-drive range in 2017 and says the engines are developed and validated in France (PowerKit brochure).
| Site | Founded | What it builds |
|---|---|---|
| Cassis, France (headquarters) | Baudouin dates from 1918 | Head office, 17,000 m²; ISO 9001 and ISO 14001 |
| Pune, India | 2011 | PowerKit diesel |
| Weifang, China | 1946 | PowerKit diesel, gas and VS, marine propulsion; 32,000 m² |
Source: Baudouin, our company. Weichai’s Chinese product site lists the 6M33 to 20M61 as Weichai power-generation engines (Weichai), while its English product site files the same series under Baudouin (Weichai, English). An offer that says “Weichai” or “Baudouin” should state which brand and which plant are on the engine’s dataplate.
Weichai’s genset-engine series
Weichai gives its power-generation engines a range of 18 to 5,450 kWm, on diesel, natural gas, biogas and oilfield gas, and its diesel sets 12 to 5,000 kWe (Weichai). Its list page gives one range per diesel series, without saying whether it is prime or standby power:
Source: Weichai power-generation diesel engines, product list pages 1 and 2, 1,500 rpm; prime or standby not stated.
Baudouin PowerKit
| Series | kWm | kVA |
|---|---|---|
| 4M06 | 20–63 | 18–69 |
| 4M10 | 66–115 | 65–125 |
| 6M33 | 633–740 | 650–825 |
| 12M33 | 1,108–1,450 | 1,150–1,650 |
| 16M33 | 1,000–1,920 | 1,594–2,250 |
| 20M33 | 2,020–2,460 | 2,000–2,750 |
| 12M55 | 2,210–3,600 | 2,280–4,125 |
| 16M55 | 2,750–3,750 | 2,813–4,125 |
The full PowerKit diesel range runs from 18 to 4,125 kVA (PowerKit), and Baudouin’s data-centre engines (20M33, 12M55, 16M55, 20M55, 20M61) cover sets of 1,900 to 6,250 kVA (Baudouin). Baudouin’s 50 Hz rating card, dated November 2025, gives each model’s prime and standby figures (rating card): use it, not the series range, to compare offers.
Emissions
Weichai states that its power-generation engines cover China non-road Stages III and IV, EU Stages IIIA and V, and US EPA Tier 2 (Weichai). On Baudouin’s 50 Hz card, the Stage V models are the 4M12, 6M13, 6M16, 6M21, 6M33 and 12M33; the Stage IIIA models are the 4M08, 4M10, 4M12, 6M12, 6M16, 6M21 and 8M21; the EPA Tier 2 models are the 6M33 to 16M55; the others are listed as unregulated. Baudouin says its 6M33 and 12M33 Stage V engines for mobile and rental sets deliver 500 kWe to 1 MWe with a compact SCR and no particulate filter (Baudouin).
Warranty
Baudouin’s standard PowerKit diesel warranty is 2 years with unlimited hours at prime power, 4 years or 800 hours at emergency standby, and 2 years with unlimited hours on the data-centre range (PowerKit brochure). We found no published warranty for Weichai’s own genset engines. On a set, ask which warranty applies to the engine, who holds it, and who handles a claim in your country.
Checking the engine and its parts
Weichai’s genuine parts and oil carry anti-counterfeit labels, checked by scanning the QR code or photographing the dot-matrix code through the Weichai Mall WeChat account or the Weichai Tongxing app (Weichai; in English). Weichai’s service line is +86 400-618-3066. We found no nameplate layout, serial-number format or whole-engine check published by Weichai or Baudouin, so the check rests on the dataplate of the actual engine:
- Brand, model and serial number on the engine’s dataplate, photographed on the unit for your order.
- Prime and standby ratings for that model from Weichai’s or Baudouin’s own data, not the series range.
- For a Baudouin engine, the plant that built it: Cassis, Pune or Weifang.
- The emissions stage the destination requires, stated for that engine.
- At the factory test, the same serial number on the engine, the test report and the packing list.
Frequently asked questions
Who makes Baudouin engines? Is Baudouin a Chinese company?
Baudouin was founded in Marseille in 1918 and is headquartered in Cassis, France. Weichai Power bought it in January 2009, after Baudouin went into receivership at the end of 2008, and Baudouin describes itself as part of the Weichai Group. Its PowerKit engines are developed and validated in France and built in Cassis, in Pune, India, and in Weifang, China.
Are Weichai and Baudouin engines the same?
Some are. Weichai’s Chinese product site lists the 6M33, 8M33, 12M33, 16M33, 20M33, 12M55, 16M55, 20M55 and 20M61 as Weichai power-generation engines; its English product site files the same series under Baudouin. Weichai’s smaller WP series appear under the Weichai name only. Ask the seller which brand and which plant are on the engine’s dataplate.
What warranty does a Baudouin genset engine carry?
Baudouin’s standard PowerKit diesel warranty is 2 years with unlimited hours at prime power, and 4 years or 800 hours at emergency standby; its data-centre range carries 2 years with unlimited hours. Weichai publishes no warranty for Weichai-branded genset engines, so get it in writing from the seller.
Does Weichai or Baudouin make EU Stage V genset engines?
Yes. Weichai states that its power-generation engines cover EU Stage V among other stages. Baudouin lists Stage V versions of the 4M12, 6M13, 6M16, 6M21, 6M33 and 12M33 on its 50 Hz rating card, and says its 6M33 and 12M33 Stage V engines for mobile and rental sets deliver 500 kWe to 1 MWe with a compact SCR and no particulate filter.
Weichai- and Baudouin-engined sets
Sinospect quotes generating sets with the engine series on the quotation and the maker and plant in the order contract, and on sets bought directly witnesses the factory test: see generator FAT witnessing. The other engine families are on the engine makers page, and the buyer’s guide covers ratings, offers and the load test.
Looking at a Weichai or Baudouin set from China?
Send the offer you have. A review checks the engine named against the maker’s data; the dataplate is checked when the unit is inspected. We reply with the review’s scope and any fee before paid work begins. To buy a set from us instead, see the generating-set offer.