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Products & ServiceMarine engines

Weichai WP4.1N series marine diesel engine (88-140kW)

Parameters Table

Type Four-stroke, water cooled, in-line, turbocharged and aftercooled Number of cylinders 4
Bore & stroke 105×118 (mm) Displacement 4.088L
Oil consumption rate ≤0.1 g/kW·h Noise ≤92 dB(A)
Minimum fuel consumption rate 198 g/kW·h Idle speed 700 r/min
(facing the flywheel)
Counter-clockwise Net weight 480 kg
Dimensions (L×W×H) 960×700×850 (mm)

Model Portfolio Table

Series Model Aspiration Rated power
Fuel system Emission Power rating
WP4.1N WP4.1NC120-18E220 TA 88/120 1800 HPCR / P1
WP4.1NC130-21E220 TA 95/130 2100 HPCR / P1
WP4.1NC142-18E220 TA 105/142 1800 HPCR / P1
WP4.1NC163-21E220 TA 120/163 2100 HPCR / P1
WP4.1NC190-26E220 TA 140/190 2600 HPCR IMO Ⅱ P3

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

  • High torque reservation
  • Minimum fuel consumption 200g/kW·h
  • Overhaul period of 12000 h
  • Emissions meet IMOⅡ

Safe and reliable 

  • Body, cylinder head, piston, bearing and other structural parts of the new design, Weichai Rui power base production
  • 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 in medium and low speed range, continuous output and strong power
  • Precise control by electronic control unit, high injection pressure and superior acceleration performance
  • 50% rated speed can reach 132% rated torque

Economical and fuel-efficient 

  • Adopt high pressure common rail technology, use Bosch fuel system, Weichai independent ECU, precise control of fuel injection volume
  • Minimum fuel consumption rate 200g/kW•h
  • Oil replacement cycle ≥500h

Comfortable and environmentally friendly  

  • NVH optimization match, low noise
  • Gear chamber cover, cylinder cover, closed flywheel housing noise reduction design, reduce noise leakage
  • Using electric control multiple injection, greatly reduce vibration and noise
  • Emissions meet the requirements of IMOⅡ 

Strong applicability 

  • Optional vibration isolation pad, hand pressure pump and other configurations to meet the needs of different customers
  • Adjust different control strategies according to different performance requirements
  • Receive/output a variety of control signals to meet the requirements of automatic control 
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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