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Weichai 12M33 Series Marine Engine

    Weichai 12M33C series — 39.2L 12V configuration delivering 900–1500 HP at 1500–1800 rpm for unrestricted P1 continuous duty large vessel operations.

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    900–1500 HP Output 9 models across 1500–1800 rpm, P1 unrestricted continuous duty for large commercial vessels.
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    39.2L 12V Configuration 150×185 mm bore/stroke, cast iron gantry block, one-piece casting crankshaft, wet liners.
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    IMO Tier II Certified T/TA aspiration meets international marine emission standards for commercial operations.
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    Marine-Grade Turbo Marine-specific turbocharger, water jacket exhaust manifold, washable metal-element air filter.
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    Safe Fuel System P-type in-line pump, dual-skinned pipes with alarm, duplex filters replaceable while running.
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    CCS & EIAPP Approved 2350×1466×1720 mm, 4500 kg dry weight. Optional air starter, remote harness & classification trial.
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Product Description

The Weichai 12M33 Series marine diesel engine features a 150x185mm bore and 39.2L inline 12-cylinder design, delivering 900-1500HP (662-1100kW) across 1500-1800RPM for P1 (unrestricted continuous) to P4 (high-performance intermittent) duties. Key components include a one-piece casting crankshaft, wet liners, oil-cooled aluminum pistons, and a metal-element lubrication system, paired with a mechanical fuel pump and marine-optimized turbocharging for efficient combustion and low emissions. With 24V electric starting, intelligent voyage monitoring, and CCS/EIAPP certification, it supports optional air starting, remote monitoring, and PTO, ideal for ocean-going cargo ships, workboats, and high-performance fishing vessels. Dimensions: 2350x1466x1720mm, dry weight 4500kg.

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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