M21 Series · 12.54/16.72 L · China marine Stage II emission / IMO Tier Ⅱ
M21 Series Marine Diesel Engine
Models: 6M21Y650-23E201 · 6M21Y750-23E201 · 6M21Y815-23E201 · 6M21Y815-23E200 · 6M21Y900-23E201 · 6M21Y900-23E200 · 6M21Y1000-23E201 · 6M21Y1000-23E200 · +8 more in the line-up
Fuel type: ordinary diesel
478-1000
Power range (kW)
2300
Speed range (r/min)
Product Advantages
- Safe and reliable. High-strength design of the block, cylinder head and crankshaft; key components such as the turbocharger and high-pressure fuel pump are selected from excellent global suppliers.
- After 2000h of rigorous endurance testing, high reliability within the effective service life is achieved, guaranteeing vessel availability.
- Strong power. Two-stage turbocharging and two-stage intercooling give a power output per liter of up to 59kW/L and strong power.
- Low-speed high torque with strong instantaneous load response and fast acceleration.
- Fuel efficient. The electronic control unit provides precise control; the 2200bar high-pressure common rail fuel system reaches a minimum fuel consumption rate of 204g/kW·h for a longer cruising range.
- Dedicated optimization of the piston ring structure, camshaft profile and more keeps the oil consumption rate no higher than 0.3 g/kW·h.
- Comfortable and eco-friendly. Low-noise designs such as pilot injection calibration and intake silencing keep whole-engine noise no higher than 105dB(A).
- Meets EPA 3, IMO Tier Ⅱ and the China marine Stage II emission-stage emission standards.
- Connected intelligence. The proprietary ECU is safe and controllable and is equipped with the smart cloud platform to enable remote diagnosis, repair guidance and maintenance reminders.
- A comprehensive diagnostic system with reserved sensor interfaces meets the requirements of intelligent vessels.
Specifications
| Engine type | four-stroke, water-cooled, inline/V-type, turbocharged and intercooled |
| Bore / stroke (mm) | 127×165 |
| Number of cylinders | 6/8 |
| Displacement (L) | 12.54/16.72 |
| Torque reserve (%) | 15-30 |
| Oil consumption rate (g/kW·h) | ≤0.3 |
| Minimum fuel consumption rate (g/kW·h) | 204 |
| Idle speed (r/min) | 700 |
| Noise (dB(A)) | ≤102 |
| Crankshaft rotation direction | clockwise (viewed from the free end) |
| Overall dimensions (L×W×H) (mm) | 6-cylinder: 1697×1079×1088; 8-cylinder: 1632×1254×1313 |
| Net weight (kg) | 6-cylinder: 1450; 8-cylinder: 2052 |
Note: product parameters and images are for reference only and are subject to change without notice.
Note: for products marked with an asterisk (*), the delivery time is subject to the manufacturer’s confirmation; the parameters and model line-up are for reference only, and delivery dates and fishing-vessel line-ups should be requested from us as formal documentation.
Model Line-up
| Series | Model | Aspiration | Power (kW / Ps) | Speed (r/min) | Technology route | Emission level | Power rating |
|---|---|---|---|---|---|---|---|
| 6M21 | 6M21Y650-23E201 | turbocharged and intercooled | 478/650 | 2300 | electronically controlled high-pressure common-rail pump | China marine Stage II emission | P3(MCD2) |
| 6M21 | 6M21Y750-23E201 | turbocharged and intercooled | 551/750 | 2300 | electronically controlled high-pressure common-rail pump | China marine Stage II emission | P3(MCD2) |
| 6M21 | 6M21Y815-23E201 | turbocharged and intercooled | 599/815 | 2300 | electronically controlled high-pressure common-rail pump | China marine Stage II emission | P3(MCD2) |
| 6M21 | 6M21Y815-23E200 | turbocharged and intercooled | 599/815 | 2300 | electronically controlled high-pressure common-rail pump | IMO Tier Ⅱ | P3(MCD2) |
| 6M21 | 6M21Y900-23E201 | turbocharged and intercooled | 662/900 | 2300 | electronically controlled high-pressure common-rail pump | China marine Stage II emission | P4(HD) |
| 6M21 | 6M21Y900-23E200 | turbocharged and intercooled | 662/900 | 2300 | electronically controlled high-pressure common-rail pump | IMO Tier Ⅱ | P4(HD) |
| 6M21 | 6M21Y1000-23E201 | turbocharged and intercooled | 735/1000 | 2300 | electronically controlled high-pressure common-rail pump | China marine Stage II emission | P5(INT) |
| 6M21 | 6M21Y1000-23E200 | turbocharged and intercooled | 735/1000 | 2300 | electronically controlled high-pressure common-rail pump | IMO Tier Ⅱ | P5(INT) |
| 8M21 | 8M21Y1000-23E201 | turbocharged and intercooled | 735/1000 | 2300 | electronically controlled high-pressure common-rail pump | China marine Stage II emission | P3(MCD2) |
| 8M21 | 8M21Y1000-23E200 | turbocharged and intercooled | 735/1000 | 2300 | electronically controlled high-pressure common-rail pump | IMO Tier Ⅱ | P3(MCD2) |
| 8M21 | 8M21Y1100-23E201 | turbocharged and intercooled | 809/1100 | 2300 | electronically controlled high-pressure common-rail pump | China marine Stage II emission | P3(MCD2) |
| 8M21 | 8M21Y1100-23E200 | turbocharged and intercooled | 809/1100 | 2300 | electronically controlled high-pressure common-rail pump | IMO Tier Ⅱ | P3(MCD2) |
| 8M21 | 8M21Y1250-23E201 | turbocharged and intercooled | 919/1250 | 2300 | electronically controlled high-pressure common-rail pump | China marine Stage II emission | P4(HD) |
| 8M21 | 8M21Y1250-23E200 | turbocharged and intercooled | 919/1250 | 2300 | electronically controlled high-pressure common-rail pump | IMO Tier Ⅱ | P4(HD) |
| 8M21 | 8M21Y1360-23E201 | turbocharged and intercooled | 1000/1360 | 2300 | electronically controlled high-pressure common-rail pump | China marine Stage II emission | P5(INT) |
| 8M21 | 8M21Y1360-23E200 | turbocharged and intercooled | 1000/1360 | 2300 | electronically controlled high-pressure common-rail pump | IMO Tier Ⅱ | P5(INT) |
Request a Quote
Send the model designation (for example 6M21Y650-23E201), the required quantity and your destination port.
At a glance
As an original Weichai diesel engine supplier, we supply the M21 Marine Diesel built as a four-stroke, water-cooled, inline/V-type, turbocharged and intercooled unit. Rated output spans 478–1000 kW. It is supplied to meet China marine Stage II emission emission requirements.
Technical details
The Weichai M21 Marine Diesel is built on a four-stroke, water-cooled, inline/V-type, turbocharged and intercooled configuration with 6/8 cylinders architecture. Displacement is 12.54/16.72. It is offered for 204 operation. For installation planning, the unit has a dry weight of 6-cylinder: 1450; 8-cylinder: 2052 kg and an idle speed of 700 r/min.
Typical applications
The Weichai M21 Marine Diesel is specified for duty. Confirmed applications include the following, and we can advise on suitability for your machine:
- Fuel type: ordinary diesel
M21 Marine Diesel frequently asked questions
What is the power range of the Weichai M21 Marine Diesel?
The M21 Marine Diesel covers 478–1000 kW. Confirm the exact sub-model code before ordering, because output varies across the model line-up.
Which emission standard does the M21 Marine Diesel meet?
This unit is offered to China marine Stage II emission. Tell us your destination market and we will confirm the certification route before shipment.
Is the M21 Marine Diesel a genuine Weichai engine?
Yes. Units are sourced through controlled supply channels to original factory specification and are supplied with export packing and documentation.
How is the M21 Marine Diesel shipped and how long does delivery take?
Engines are crated for export and consolidated at the port. Send your model designation, quantity and destination port for a firm quotation and lead time.
What is the configuration of the M21 Marine Diesel?
The M21 Marine Diesel is built on a four-stroke, water-cooled, inline/V-type, turbocharged and intercooled, 6/8 cylinders, 12.54/16.72 of displacement layout. Send us your machine model if you need confirmation that this layout fits your installation.