Language Switch

Products & ServiceMarine engines

Weichai WP3.2 series marine diesel engine (25-36.8kW)

Parameters Table

Four-stroke, water cooled, in-line, naturally aspirated
Number of cylinders 4
Cylinder Bore/stroke 98×105(mm) Displacement 3.17L
Oil consumption rate ≤0.1g/kW·h Noise ≤96dB(A)
Minimum fuel consumption rate 200g/kW•h Idle speed 650±20r/min
Rotation direction of crankshaft
(facing the flywheel end)
Counter-clockwise Net weight 300kg
Dimensions Length × Width × Height 740×612×722(mm)

Model Portfolio Table

Series Model Air intake mode Rated power kW/Ps Speed r/minn Fuel feeding mode Emission level Power classification
WP3.2* WP3.2C34-15E321 Naturally aspirated 25/34 1500 HPCR - P1
WP3.2C37-18E321 Naturally aspirated 27/37 1800 HPCR - P1
WP3.2C41-15E321 Naturally aspirated 30/41 1500 HPCR - P1
WP3.2C50-24E321 Naturally aspirated 36.8/50 2400 HPCR - P1

Remark: The delivery date of products marked with * shall be subject to the reply of the manufacturer. Product parameters and model portfolio are for reference only. Please contact relevant personnel for official information on delivery time and fishing boat model portfolio.

Product description

  • Torque reserve 25%
  • Minimum fuel consumption 196g/kW.h
  • Overhaul period of 12000 h
  • Emissions meet the requirements of IMOⅡ 

  Safe and reliable 

  • The new Weichai Rui power platform products, the body, cylinder head, piston, bearing bush and other new design
  • Using the global excellent supplier system of Weichai, the quality of parts is reliable
  • Dust-free, constant temperature assembly workshop, high precision test bench

  Strong power

  • High torque, continuous output and strong power in medium and low speed range
  • Precise control by electronic control unit, high injection pressure and superior acceleration performance
  • 50% rated speed can reach 95% rated torque

  Economical and fuel-efficient 

  • Using electronic control high pressure common rail technology, accurate control of fuel injection, economic operation area is wider
  • Minimum fuel consumption rate 196g/kW•h
  • Oil replacement cycle ≥500h 

  Comfortable and environmentally friendly  

  • Electronic control multiple injection, greatly reduce vibration and noise, idle noise 74dB (A)
  • NVH optimization matching of the whole machine, gear chamber cover, cylinder cover, closed flywheel housing noise reduction design, reduce noise leakage
  • Adopt body stiffening plate, piston pin offset structure, the vibration of the whole machine is better than that of competing products
  • Emissions meet the requirements of IMOⅡ 

  Strong applicability 

  • Intelligent terminal, maintenance reminder
  • Water jacket exhaust pipe and exhaust tail pipe to reduce cabin temperature
  • Optional Internet intelligent instrument, installed sea water pump, damping pad and other configurations, to meet the needs of different customers 
Back to top

R & D

20000 +
Global R & D personnel
R & D institutions in five countries, ten regions


  • 5,000,000 units
  • 22-10000Ps
  • 200 million kilowatts
  • Application for all markets