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Weichai M33 Marine Diesel Engine Series (368-1103kW)


Product Profile

Weichai M33 marine diesel engine series is developed based on M26 series with extended stroke and increased power, inheriting M26’s large power reserve, low fuel consumption, high reliability, and convenient use and maintenance. It is the ideal power for inland navigation, fishing, engineering ship and official boats.

Product parameters

Series 4-Stroke、water cooling、In-Line、Dry cylinder sleeve Number of cylinders 6/12
Cylinder Diameter/Stroke 150×185mm Displacement 19.6/39.2L
specific lub-oil consumption 190g/kW·h Oil consumption 0.8g/ kW·h
Start Mode Electric start


Firing Order 1-5-3-6-2-4 Smoke intensity ≤1.0Rb
Noise ≤105dB(A) Emission standard IMO TIER II

Crankshaft rotation direction

(towards free end)


Product Spectrum

Model Air intak Rated Power(kW/Ps) Speed(r/min)
6M33C500-15 Supercharged and cold 368/550 1500
6M33C550-15 Supercharged and cold 405/550 1500
6M33C600-15 Supercharged and cold 441/600 1500
6M33C650-15 Supercharged and cold 478/650 1500
6M33C600-18 Supercharged and cold 441/600 1800
6M33C650-18 Supercharged and cold 478/650 1800
6M33C700-18 Supercharged and cold 515/700 1800
6M33C750-18 Supercharged and cold 551/750 1800
12M33C900-15 Supercharged and cold 662/900 1500
12M33C1000-15 Supercharged and cold 735/1000 1500
12M33C91100-15 Supercharged and cold 809/11000 1500
12M33C1200-15 Supercharged and cold 882/1200 1500
12M33C1300-15 Supercharged and cold 956/1300 1500
12M33C1200-18 Supercharged and cold 882/1200 1800
12M33C1300-18 Supercharged and cold 956/1300 1800
12M33C9140-18 Supercharged and cold 1029/1400 1800
12M33C1500-18 Supercharged and cold 1103/1500 1800

Remarks: Product parameters and portfolio are for reference only. For fishing vessel engine portfolio, please contact relevant personnel for official information.

Product Features

  • Cast iron engine body with mesh structure for high strength and good cooling performance.
  • Manual oil pump, bypass oil filter and high-flow oil pump that ensure stable engine performance.
  • All-copper seawater pump with cooling water and oil pipeline emergency joint to ensure reliable engine operation.
  • Newly designed air filter with optimized structure and sealing for higher filtration efficiency, cleaner intake, more compact and reasonable structure, and easier filter element replacement.
  • The newly designed oil sump for ships increases the heat dissipation area of the oil and fully considers its damping performance.
  • High reliability with an average service life of over 30,000 hours.
  • Good economy, featuring optimized engine intake and fuel system that explore engine potential and reduce fuel consumption.
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Global R & D personnel
R & D institutions in five countries, ten regions


  • 4,000,000 units
  • 25-10000Ps 
  • 200 million kilowatts
  • Whole areas of application

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