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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, China Advance/Fada Marine Gearbox for Boat/Ship/Vessel with CCS Certificate (HCD1000/HCD1400/HCD2000), Weichai Wp12c450-21 (450HP/2100rpm) Diesel Engine Use for Marine 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.:
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

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

Main parameters and Overall Dimensions

Rated speed(rpm)9001000

Diesel engine powerGenerator powerDiesel engine powerGenerator power

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 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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