Powertrain

WP4.1N series marine engines

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Technical tables use display translations outside Chinese. The linked manufacturer catalogue retains the original text. Confirm the full model and nameplate before ordering.

Specifications

Type: Four-stroke, water-cooled, in-line, supercharged and intercooled
Bore/stroke mm: 105×118
Number of cylinders: 4
Displacement L: 4.1
Torque reserve %: 20-35
Oil consumption rate g/kW·h: ≤0.1
Minimum fuel consumption rate g/kW·h: 193
Idle speed r/min: 700±20
Noise dB(A): ≤97
Crankshaft rotation direction: Counterclockwise (facing the free end)
Overall dimensions (length × width × height) mm: 960×700×867
Net weight kg: 500

Model variants

Series	Model	Air intake method	Power (kW/Ps)	Speed (r/min)	Technical route	Emission levels	Power classification
WP4.1N	WP4.1NC120-18E220	Turbocharged and intercooled	88/120	1800	Electronically controlled high-pressure common rail pump	China Marine Stage II	P1(MCR)
WP4.1N	WP4.1NC142-18E220	Turbocharged and intercooled	105/142	1800	Electronically controlled high-pressure common rail pump	China Marine Stage II	P1(MCR)
WP4.1N	WP4.1NC130-21E220	Turbocharged and intercooled	95/130	2100	Electronically controlled high-pressure common rail pump	China Marine Stage II	P1(MCR)
WP4.1N	WP4.1NC163-21E220	Turbocharged and intercooled	120/163	2100	Electronically controlled high-pressure common rail pump	China Marine Stage II	P1(MCR)
WP4.1N	WP4.1NC177-23E220	Turbocharged and intercooled	130/177	2300	Electronically controlled high-pressure common rail pump	China Marine Stage II	P3(MCD2)
WP4.1N	WP4.1NC190-26E220	Turbocharged and intercooled	140/190	2600	Electronically controlled high-pressure common rail pump	IMOTierⅡ/China Marine Stage II	P3(MCD2)