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Weichai WP4C Series Marine Diesel Engine

    Weichai WP4C/WP6C series delivers 120–250 HP for small-to-medium vessels — lightweight, fuel-efficient and IMO Tier II compliant.

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    Wide Power Range 120–250 HP across WP4C and WP6C models to match your vessel size.
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    Fuel Efficient As low as ≤195 g/kW·h — mechanical governor ensures stable output under load.
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    12,000 Hour Overhaul Life Reinforced crankshaft, wear-resistant cylinder liners for long service intervals.
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    IMO Tier II Compliant Meets international emission standards for commercial marine operations.
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    Global Spare Parts Worldwide parts availability — minimal downtime for maintenance anywhere.
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    Multi-Vessel Ready Ideal for fishing boats, passenger vessels and workboats. SAE NO.1#14 flywheel.
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Product Description

The WP4 Series marine diesel engine is engineered for small-to-medium vessels, offering 95-120 HP with efficient combustion technology and a lightweight frame (450kg), achieving a fuel consumption rate of 195g/kW·h. Its reinforced crankshaft and wear-resistant cylinder liners ensure a 12,000-hour overhaul interval, with global spare parts compatibility and IMO Tier II compliance, ideal for fishing boats, passenger vessels, and workboats.

Technical Specifications

Item WP4C Series WP6C Series
Model WP4C120-18 WP6C185-21 WP6C250-23
Type In-line,water-cooled,four-stroke
Number of cylinders -bore ×stroke(mm) 4-105×130 6-105×130
Displacement (L) 4.5 6.75
Induction system Turbocharged & intercooled
Rated power/speed (kW(Ps)/r/min) 88(120)/1800 136(185)/2100 168(250)/2300
Min.specific fuel consumption of external
characteristics (g/kW·h)		 ≤195 ≤212
Oil consumption rate(g/kW-h) ≤0.2
Idle speed 650±30 r/min
Governor Mechanical
Fywheel  housing SAE NO.1#14
Certificates ZC、CCS、EIAPP、China Il
DiemensiontificawteH)(mm) 1065×819×1056 1360×890×1054
Dry weight(kg) 600 750
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