WD12 Marine Diesel Engine


Weichai WD12 marine diesel engine series is developed based on WD 10 series with extended stroke and increased power, inheriting WD10’s large power reserve, low fuel consumption, high reliability, and convenient use and maintenance.

Product Parameters

Series 4-Stroke, Water cooling, In-Line, Dry cylinder sleeve
Cylinder Diameter/Stroke 126×155mm
Specific lub-oil consumption 195g/kW-h
Start Mode Electric start
Firing Order 1-5-3-6-2-4
Noise ≤119dB (A)
Oil Consumption 0.5g/ kW-h
Number Of Cylinders 6
Displacement 11.596L
Crankshaft Rotation Direction (towards free end) Clockwise
Idling 650±30r/min
Smoke Intensity ≤1.0Rb
Emission Standard IMO TIER II

Product Spectrum

Model Air intake Rated Power (kW/Ps) Speed (r/min)
WD12C300-15 Supercharged and cold 220/300 1500
WD12C300-18 Supercharged and cold 220/300 1800
WD12C327-15 Supercharged and cold 240/327 1500
WD12C327-18 Supercharged and cold 240/327 1800
WD12C350-18 Supercharged and cold 258/350 1800
WD12C375-21 Supercharged and cold 275/375 2150
WD12C400-21 Supercharged and cold 294/400 2150


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

Product Features

Main bearing with support to have high rigidity,low vibration and low noise.

BMEP, specific power and other indicators are at the domestic leading level.

Internal and external double-circulation water-cooling: internal circulation uses fresh water to cool the engine, and the external circulation uses seawater to cool the fresh water through the sea-fresh water heat exchanger to improve the service life of the engine. Optional water jacket exhaust pipe can be used to reduce the cabin temperature.

The unique remote navigation monitoring system can monitor the engine speed,water temperature,oil temperature and pressure data in real time. When the engine parameters exceed the limit, it can automatically alarm and stop the engine.
Turbulence mode is now added to ensure no shut-down would happen when the ship encounters wind and waves.

Energy-saving and fuel-saving: The properly designed intake oil supply system broadens the operating range and maintains low fuel consumption in the common working conditions and even in the speed range of the ship.

Powerful: large power reserve and maximum output torque of 1500N.m, bringing out fast acceleration and high speed suitable for high-speed ships and heavy-duty fishing boats.

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