Gold Member Since 2016
Audited Supplier
Xiamen Sitaiqi Industry and Trade Co., Ltd.

Marine Engine, Boat Engine, Fishing Boat manufacturer / supplier in China, offering Weichai-Man Marine Diesel Engine L21/31 Serise, Chinese Liuchai Marine Diesel Engines for Sale (420HP-680HP), Chinese Liuchai Marine Inboard Diesel Engines for Sale (50HP~90HP) and so on.

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Supplier Homepage Product Marine Engine Weichai Weichai-Man Marine Diesel Engine L21/31 Serise

Weichai-Man Marine Diesel Engine L21/31 Serise

Purchase Qty.:
(Pieces)
1-999 1,000+
FOB Unit Price: US $15,000 US $14,500
Purchase Qty. (Pieces) FOB Unit Price
1-999 US $15,000
1,000+ US $14,500
Get Latest Price
Production Capacity: 100 Set/ Month
Transport Package: Standard Plywood Case
Payment Terms: L/C, T/T, D/P, Western Union

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Basic Info
  • Model NO.: L21/31 serise
  • Fuel Type: Diesel
  • Engine Position: Inboard
  • Bore*Stroke(mm): 210*310
  • Frequency: 50-60Hz
  • No.of Cylinder: 5 6 7 8 9
  • Origin: Shangdong, China(Mainland)
  • Cylinders: 5
  • Engine: 4 Stroke
  • Condition: New
  • Rated Speed: 900-1000rpm
  • Net Weight(T): 22.5-36.5
  • Trademark: weichai
  • HS Code: 840810000
Product Description
Weichai-Man Marine Diesel Engine L21/31 Serise 


Weichai-Man Marine Diesel Engine L21/31 Serise

According to different applications.L21/31serise products are divided into two types:one for Genset and the other for propulsion.Products for Genset have 5,6,7,8 and 9 cylinders with speeds of 900rpm and 1000rpm,and they have a power range form 950kw to 1881kw.Products for propulsion have 6,7,8 and 9 cylinders with a speed of 1000rpm and a power range of 1290kw to 1935kw.

Performance Features

1,Powerful
2,High economic performance
3,High reliability
4,Better environment protection
5,High safety
6,Good adaptability

Main parameters and Overall Dimensions


Bore*stroke(mm)210*310
Rated speed(rpm)9001000
Frequency(Hz)6050

Diesel engine powerGenerator powerDiesel engine powerGenerator power
5L21/311000KW950KW1000KW950KW
6L21/311320KW1254KW1320KW1254KW
7L21/311540KW1463KW1540KW1463KW
8L2/311760K1672K1760KW1672KW
9L21/311980KW1881KW1980KW1881KW

Cylinder numbers56789
r  /  min900/1000900/1000900/1000900/1000900/1000
A   mm39594314466955725927
B  mm18702000197021102135
C  mm58296314663976828062
H  mm31833183328932893289
Net weight(T)22.526.029.533.036.5





Weichai-Man Marine Diesel Engine L21/31 Serise


Construction Features


1   Cylinder block

       overall rigid design philosophy:the main bearing tie-rods are used in the cylinder block which of offers the engine unique side tie-rod main bearing structure to withstand  compres sive stress.The safety factor is high.Convenient of repairing and maintenance for no water cavties inside the whole engine body.

2   Cylinder unit

      The cylinder liner has fire ring structure.The cylinder unit consists of cylinder head cylinder liner and connecting rod.After fixing the cylinder unit.it is mounted on the engine,it is fast and convenient in maintenacne.

3   Connecting rod

     Connecting rod consists of connecting rod body,connecting rod marine head (upper and lower both).Decrease hoisting height to make crankshaft pin bigger and increase crankshaft strength.

4   Supercharged and intercooled system

     MAN's advanced turbocharger is adopted to provide the best matching
     Two-stage intercooled system is adopted in intake process to control air temperature more precisely and rapidly.

5   Fuel pump

     Specialized unit pump producted by MAN is adpoted.

6   Pipeline

     Adopting the "engine with no pipeline"design concept,oil pipeline is intergrated in the cylinder with no water pipeline.

7   Safety control system

     SaCosone safety control system product by MAN Company is used in GENSET to ensure a long engine operation without failure.


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