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Weichai WD12 Series Marine Diesel Engine

    Weichai WD12 series — 11.6L inline 6-cylinder, 300–400 HP P1 continuous duty at 1500–2150 rpm, IMO Tier II certified.

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    300–400 HP Output 6 models across 1500–2150 rpm, P1 continuous duty for unrestricted commercial operation.
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    11.6L Proven Platform 126×155 mm bore/stroke, forged crankshaft, dry liners, aluminum alloy pistons with gallery oil cooling.
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    IMO Tier II Compliant T/TA aspiration with mechanical pump meets international marine emission standards.
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    Dual Cooling System Fresh/raw water heat exchanger with thermostat, centrifugal pump, self-priming raw water pump.
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    Safe Fuel System P-type in-line pump, dual-skinned pipes with alarm, duplex filters replaceable while running, water separator.
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    CCS & EIAPP Certified SAE1 flywheel housing, 24V starter, voyage safeguard monitor, 1534×807×1512 mm, 1100 kg dry weight.
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Product Description

The Weichai WD12 Series marine diesel engine features a 126x155mm bore and 11.6L inline 6-cylinder design, delivering 300-400HP (220-294kW) across 1500-2150RPM for P1 (unrestricted continuous) to P4 (high-performance intermittent) duties. Key components include a forged crankshaft, dry liners, oil-cooled aluminum pistons, and duplex oil filters, paired with a mechanical fuel pump and turbocharging for efficient combustion and low emissions. With 24V electric starting, intelligent monitoring, and CCS/EIAPP certification, it supports optional remote monitoring and PTO, ideal for fishing boats, cargo ships, and workboats. Dimensions: 1534x807x1512mm, dry weight 1100kg.

P1 Duty P2 Duty P3 Duty P4 Duty
Application Unrestricted continuous continuous intermittent high performance
Engine load variations Very little or none continuous important very important
Mean engine load factor 80 to 100% 30 to 80% 50% 30%
Annual working time More than 5000 h 3000 to 5000 h 1000 to 3000h less than 1000 h
Time at full load unlimited 8 h each 12 h 2 h each 12 h 1 h each 12 h

 

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