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Weichai X6170ZC680-3 Marine Engine: The Definitive 680 HP Propulsion Solution for Commercial Vessels
The Weichai X6170ZC680-3 is a proven medium speed marine propulsion engine developed for commercial vessels that require dependable power, fuel efficiency, and long operating life. Rated at 680 HP (500kW) at 1350 RPM, this engine belongs to the well-established Weichai 6170 series marine engine platform, which has been widely adopted by shipyards, vessel operators, and marine engineering companies throughout Asia, Africa, South America, and other international markets.
As a mechanical fuel pump engine, the X6170ZC680-3 offers a practical balance between performance and maintenance simplicity. Vessel owners appreciate its robust construction, stable operation under continuous load conditions, and accessibility of spare parts. Whether installed in a fishing vessel, coastal cargo ship, tugboat, or inland transport vessel, the engine is designed to provide reliable propulsion power in demanding marine environments.
Tech Specs of Weichai X6170ZC680-3
General Engine Data
Engine Model: Weichai X6170ZC680-3
Cylinder Count: 6 / 8 Cylinders in Line
Engine Type: 4-stroke, water cooled, in-line, turbocharged and aftercooled
Total Engine Displacement: 27.24 L / 36.32 L
Bore * Stroke: 170×200 (mm)
Dimensions L×W×H) / net weight: L6 2463×1200×1650 (mm) / 3100kg; L8 2650×1040×1818 (mm) / 3800kg
Key Performance Data
Rated Power: 500 kW / 680 HP
Rated Speed: 1350 RPM
Idle Speed: 450-650 RPM
Minimum fuel consumption rate: 197 g/kW.h
Oil consumption rate: ≤0.5 g/kW.h
Torque reserve: 20-34%
More Technical Data
Certification: IMO Tier II
Aspiration: turbocharged and aftercooled
Starting system: Gas/Electrical
Rotation(facing the flywheel) : Counter-clockwise
Fuel system: Mechanical pump
Power rating: P1
Noise: ≤105 dB(A)
Technical Architecture of the Weichai 170 Series Marine Engine
Understanding the inner workings of the Weichai 170 series marine engine shows why it dominates coastal and inland waterways. The design focuses on thermal efficiency, structural rigidity, and ease of manual maintenance.
High-Pressure Mechanical Fuel System Breakdown
At the heart of the engine sits the heavy-duty Weichai mechanical fuel pump engine assembly. While newer designs rely entirely on electronic common-rail systems, the X6170ZC680-3 uses a highly refined mechanical P-type injection pump. This pump forces fuel through multi-hole injectors at precisely timed intervals synchronized directly with the camshaft.
This mechanical configuration provides excellent resilience against varying marine fuel qualities. It shrugs off moisture micro-contamination that often jams electronic actuators.
Furthermore, the Weichai X6170ZC680-3 fuel consumption rate stays locked at a highly efficient minimum of 197g/kW·h. It achieves this through clean fuel atomization and a pulse-conversion turbocharger that scavenges exhaust energy across all six cylinders.
Rigid Block Engineering and Component Durability
The cylinder block uses an in-line, 6-cylinder layout with a displacement of 27.24 liters. Weichai constructs the main framework from high-strength vermicular graphite cast iron. This material prevents thermal warping under continuous full-load conditions.
The individual cylinder heads feature a four-valve configuration. This optimizes both fresh air intake and exhaust gas scavenging.
Every engine shipped by our export facility features specialized wet cylinder liners. These liners use an anti-cavitation coating to extend operational lifespans before major overhauls.
Technical Comparisons: X6170ZC680-3 vs. Modern Electronic Competitors
Choosing a medium speed marine engine requires comparing traditional mechanical designs against high-speed electronic alternatives. The X6170ZC680-3 stands out specifically when evaluated on operational survival metrics.
Mechanical Simplicity vs. High-Speed Electronic Common Rail
Electronic marine diesels achieve lower baseline emissions but introduce significant failure vectors for open-sea vessels. A single corroded wiring harness or a failed sensor can trigger a total engine shutdown or force a safe-mode power restriction.
In contrast, the X6170ZC680-3 propulsion engine requires basic electrical connectivity only for its monitoring panel and starter motor. The engine can continue running and providing propulsion even if the ship suffers a complete auxiliary electrical failure.
Physical Footprint and Structural Mass Advantage
High-speed marine diesels often reduce engine mass to maximize vessel speeds, but this comes at the expense of continuous duty life. The X6170ZC680-3 engine weight sits at a substantial 3100 kg dry.
This heavy mass acts as a natural dampener against low-frequency hull vibrations. The extra metal thickness also provides deep thermal reserves, allowing the engine to run at 100% duty cycles without the rapid wear cycles seen in lighter engines.
Real Application Scenarios for the Weichai 500kW Marine Diesel
The versatility of this 500kW marine propulsion diesel makes it a popular choice across diverse commercial fleets. Its power delivery curve matches hulls that operate under heavy structural drag.
Deep-Sea and Coastal Marine Fishing Boat Diesel Engine Deployment
For commercial fishing operations, an engine must handle rapid transitions from free running to heavy towing. A marine fishing boat diesel engine needs sustained torque at lower RPM bands to pull loaded nets safely through rough seas.
The X6170ZC680-3 handles these shifts smoothly. It provides the low-end torque required to hold a vessel steady against ocean currents without overloading the transmission.
Industrial Tug Boat Propulsion Engine and Cargo Operations
Inland waterway transport demands a steady, unyielding power source. Whether serving as a tug boat propulsion engine pushing barges or a main engine for a coastal transport vessel engine, this model delivers predictable power.
Its 1350RPM rating allows for a highly efficient reduction gear ratio. This lets operators turn large, slow-pitch propellers to maximize bollard pull and overall propulsive efficiency.
Lifecycle Maintenance and Proactive Component Replacement Tips
Maintaining high performance over decades requires strict adherence to factory maintenance intervals. Working with a dedicated Weichai X6170ZC680-3 supplier like HekoPower ensures you have access to genuine replacement parts.
Injection Pump and Fuel System Maintenance Checklist
Because marine diesel frequently suffers from water condensation in fuel tanks, the primary fuel-water separators require daily inspection. The mechanical injection pump requires precise calibration every 2,500 operating hours to maintain the optimal Weichai X6170ZC680-3 fuel consumption profile. Any drop in exhaust temperatures or a change in smoke color usually points to worn injector nozzles, which are easy to replace using standard onboard tools.
Managing Cooling Loops and Zinc Anode Protection
The engine relies on a dual-loop cooling configuration. The inner loop circulates treated fresh water through the block, while an external sea-water pump cools the heat exchanger.
To prevent galvanic corrosion within the raw-water circuit, operators must check the sacrificial zinc anodes every 250 running hours. Replacing these plugs before they completely dissolve protects the cupronickel cooling tubes from pitting and pinhole leaks.
Procuring Your Engine Through HekoPower: Logistics and Quotations
When searching for a Weichai X6170ZC680-3 for sale, sourcing through an experienced China Weichai marine engine exporter protects your investment from counterfeit parts and configurations.
Streamlined Ordering, Inspection, and Delivery Timeframes
HekoPower coordinates directly with factory assembly lines to ensure your engine meets explicit hull requirements. Every engine undergoes rigorous dynamometer testing before receiving its CCS certified Weichai marine engine 680hp classification paperwork.
Our standard X6170ZC680-3 delivery time typically ranges from 30 to 45 days, depending on custom factory options like air starting systems or specialized PTO attachments.
Comprehensive Technical Documentation and Project Sizing
Every propulsion unit shipped includes a complete X6170ZC680-3 technical data sheet along with a factory-stamped Weichai marine diesel engine PDF manual. Our engineering team reviews your vessel's engine room layout against the official Weichai 500kW marine engine dimensions (2463mm x 1200mm x 1650mm). This step guarantees a smooth installation process during a fleet marine repowering diesel engine project.
Weichai WP10 series marine diesel engine, original products from Weichai. This series mainly includes WP10C313-21, WP10C350-18, WP10C375-21, WP10C395-22.
Frequently Asked Questions Regarding the Weichai X6170ZC680-3
What exact marine classification certificates are provided with this engine model?
The engine comes standard with a China Classification Society (CCS) product certificate. It also includes an international IMO II marine diesel engine air pollution prevention compliance certificate (EIAPP). If your local maritime authority requires specific cross-certifications from other international bodies, please notify our sales team during the initial quotation process.
Can the X6170ZC680-3 run continuously on lower-grade regional marine diesel fuels?
Yes. The mechanical fuel system handles higher-sulfur marine gas oil and varying fuel viscosities far better than sensitive electronic engines. Keeping your primary fuel filters clean ensures the engine maintains its standard efficiency without damaging the injection components.
What is included in the standard HekoPower shipping manifest for this engine?
Each unit ships as a complete Weichai marine power solution. This includes the core engine block, turbocharger, expansion tank, oil filters, local digital instrument monitoring panel, and an initial onboard emergency toolkit. We also supply a matched set of critical X6170ZC680-3 spare parts like head gaskets, fuel injectors, and filter elements to handle your first scheduled maintenance service.
How can I request an official Weichai marine engine quotation for my shipyard?
You can contact the HekoPower global sales office directly through our website channels. Please provide your required gearbox reduction ratio, vessel type, and destination port. Our team will generate a transparent Weichai X6170ZC680-3 price proposal, including options for ocean freight and marine cargo insurance.
