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Weichai X6170ZC620-4 Marine Propulsion Engine: The Definitive Commercial Guide
The Weichai X6170ZC620-4 marine engine is a proven medium-speed propulsion solution developed for commercial marine applications that demand reliability, fuel efficiency, and long service life. Rated at 620HP (456kW) at 1500rpm, this six-cylinder diesel engine is part of the renowned Weichai 170 series marine engine platform and is widely used in fishing vessels, cargo boats, patrol boats, harbor service vessels, and various workboat applications.
Built around a robust 170mm bore design and a displacement of 27.24 liters, the Weichai X6170ZC620-4 marine diesel engine combines strong low-speed torque with stable continuous-duty performance. Its mechanical simplicity, mature design, and global spare parts support make it a preferred choice for shipyards, fleet operators, and vessel owners seeking dependable marine propulsion power.
As an experienced engine supplier, HekoPower provides genuine Weichai X6170ZC620-4 engines, technical consultation, export services, spare parts support, and after-sales assistance for customers worldwide.
Tech Specs of Weichai X6170ZC620-4
General Engine Data
Engine Model: Weichai X6170ZC620-4
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: 456 kW / 620 HP
Rated Speed: 1500 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)
Engineering Comparison: X6170ZC620-4 vs. Alternate 170 Series Configurations
Navigating the extensive Weichai medium speed marine engine catalog can be confusing due to similar nomenclature. Many fleet managers come to HekoPower asking why they should select the X6170ZC620-4 propulsion engine over the more common 1200 RPM versions, such as the X6170ZC620-2. The distinction lies entirely in the engineering of the application profiles and gear reduction ratios.
Rated Speed and Propeller Selection Factors
The primary difference rests on the 1500 RPM rating of the dash-four variant compared to the 1200 RPM rating of legacy models. A higher engine speed means that for the same 620 horsepower output, internal cylinder pressures are slightly lower per stroke, distributing mechanical stress across a higher frequency of cycles. This setup allows the engine to pair exceptionally well with high-skew, fast-running propellers. It prevents the vessel from bogging down when transitioning from a stagnant position to full cruising velocity.
Emission Control Frameworks
Environmental mandates dictate international port access. The Weichai IMO Tier II engine classification built into this model uses advanced mechanical fuel injection timing to suppress nitrous oxide emissions without relying on complex, failure-prone electronic control units. Compared to older, unregulated 170 series variants, the X6170 marine diesel architecture utilizes redesigned cylinder heads with optimal valve positioning to achieve cleaner thermal combustion naturally.
Real-World Application Scenarios for the 620HP Platform
A marine power solution is only as good as its real-world performance under adverse maritime conditions. The 620 hp 1500 rpm marine engine for fishing boats has become an industry benchmark across Southeast Asia, Africa, and South American coastal fisheries. HekoPower actively exports this configuration for several distinct commercial vessel blueprints.
High-Endurance Commercial Fishing Vessels
In deep-sea trawling operations, the engine must pull double duty. It acts as the primary propulsion source while simultaneously driving massive hydraulic wine pumps via front-end power take-offs. The Weichai fishing boat engine handles these erratic load fluctuations smoothly. When the net drops and drag resistance triples, the internal mechanical governor instantly adjusts fuel delivery to maintain steady hull speed.
River Cargo Vessels and Inland Barges
For an inland cargo vessel moving heavy bulk commodities against strong river currents, steady power delivery is non-negotiable. The 27.24L displacement provides a massive torque reserve. This capability allows operators to push fully loaded barges through shallow waters without overloading the thermal cooling circuits.
Harbor Services and Workboats
Whether deployed as a dedicated harbor tug or a high-speed patrol boat, operational readiness dictates profitability. The rapid starting capabilities of the X6170ZC620-4 diesel engine make it ideal for emergency response and vessel towing. The engine reaches operating temperature quickly, allowing crews to transition from cold idle to working loads without risking thermal shock to the cylinder liners.
Maintenance, Overhaul Intervals, and Fleet Replacement Strategy
As a global Weichai marine engine distributor, HekoPower does not just sell machinery; we help you manage lifecycle costs. Minimizing unscheduled downtime requires a strict adherence to the factory maintenance protocols established for the Weichai 170 series 620hp platform.
Standard Service Schedules
Routine maintenance on the X6170 series is simplified by the distinct "one cylinder, one head" structural design. This feature permits mechanics to service a single piston assembly without disturbing the remaining five cylinders.
- Lubricating oil and primary filters require swapping every 250 operational hours.
- Fuel injectors should be pulled, cleaned, and pressure-tested every 1,000 hours to ensure pristine atomization.
- The sacrificial zinc anodes inside the raw water heat exchanger must be inspected monthly to stop galvanic corrosion inside the cooling lines.
Maximizing the Overhaul Lifespan
The official Weichai X6170ZC620-4 overhaul period and maintenance guidelines list the major overhaul interval at 12,000 to 15,000 hours of operation. However, using genuine Weichai X6170ZC620-4 engine oil filters and high-quality fuel can push this boundary closer to 20,000 hours. When the time comes for a mid-life refresh, sourcing a complete Weichai marine engine spare parts kit from an authorized dealer like HekoPower ensures that all replacement rings, liners, and bearings match identical factory tolerances.
Commercial Procurement: Pricing, Lead Times, and Logistics
When you look to buy Weichai X6170ZC620-4 units for commercial use, navigating the gray market can expose your business to counterfeit components. HekoPower operates as an established Weichai marine engine dealer and experienced exporter, handling all aspects of maritime logistics, factory inspection certifications, and custom packaging.
Understanding Market Pricing
The IMO Tier II Weichai X6170 series price fluctuates depending on the classification society certificates required for your specific hull. A Weichai CCS marine diesel engine certified by the China Classification Society carries specific manufacturing documentation that verifies metallurgical testing standards. Requesting a direct Weichai X6170ZC620-4 price quote from HekoPower guarantees clear, transparent pricing that includes heavy-duty export seafreight crates and moisture-resistant long-term storage wrapping.
Lead Times and Global Logistics Support
Industrial procurement timelines can make or break a shipyard construction schedule. HekoPower optimizes the Weichai marine engine lead time by maintaining direct factory pipelines. We manage the entire export process from China ports to your local destination harbor, ensuring all technical documentation, including the Weichai X6170ZC620-4 datasheet and operational manuals, accompany the physical cargo seamlessly.
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
What classification certifications are available for the Weichai X6170ZC620-4?
The engine is primarily supplied with standard CCS (China Classification Society) certification. Upon advance request during the procurement phase via HekoPower, we can facilitate secondary validation matching local maritime registry requirements for commercial workboats.
Can I obtain a digital copy of the technical manuals?
Yes. HekoPower provides the official Weichai X6170ZC620-4 PDF documentation, including the complete Weichai X6170ZC620-4 manual and installation blueprints, directly to verified clients and engineering partners during the project design phase.
What are the standard shipping arrangements for international buyers?
Every marine engine export from China handled by HekoPower utilizes a custom-built, steel-reinforced wooden skid base. The entire engine assembly is sprayed with anti-corrosion storage oil, wrapped in heavy-gauge VCI vapor-barrier film, and secured inside a standard container to block sea dampness during international transit.
How does the 1500 RPM rating affect the wear rate compared to 1200 RPM models?
The Weichai engineering team counters the slight increase in rotational velocity by utilizing hardened alloy crankshaft journals and advanced copper-lead matrix bearings. The physical wear rates remain nearly identical to lower-speed variants, provided the lubrication oil quality is strictly maintained.
Are replacement parts interchangeable across all Weichai 170 series variants?
While major structural components like the engine block housing share dimensions across the Weichai 170 series marine engine family, specific fuel injection pumps, turbocharger trims, and valve springs are tuned exclusively for the X6170ZC620-4 propulsion engine. Always verify serial numbers with HekoPower before executing parts replacement.
