Details
Weichai X6170ZC620-2 Marine Propulsion Engine (620HP / 456kW)
The Weichai X6170ZC620-2 marine engine is a proven medium-speed propulsion solution developed for commercial marine applications that demand dependable performance and long service life. Rated at 620HP (456kW) at 1200rpm, this engine belongs to the highly regarded Weichai 6170 series propulsion engine family and is designed for continuous-duty operation under demanding marine conditions.
As a six-cylinder inline diesel engine with a 170mm bore design, the X6170ZC620-2 combines strong low-speed torque with excellent fuel economy. The engine complies with IMO Tier II emission requirements, making it suitable for both domestic and international marine projects.
At HekoPower, we supply genuine Weichai X6170ZC620-2 marine engines together with spare parts support, technical consultation, and export logistics services for shipyards, fleet operators, vessel owners, and marine engineering contractors worldwide.
Tech Specs of Weichai X6170ZC620-2
General Engine Data
Engine Model: Weichai X6170ZC620-2
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: 1200 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 Analysis: Technical Comparisons in the 600HP Range
When sourcing a 620HP marine engine for commercial vessels, fleet owners often compare the mechanical system of the X6170ZC620-2 marine diesel engine against more modern common-rail electronic platforms or high-speed low-displacement alternatives.
Mechanical Injection vs. Electronic Common Rail
The X6170ZC620-2 relies on a heavy-duty, mechanically governed inline injection pump. In rugged maritime environments, this mechanical simplicity is a major advantage. While electronic common-rail engines offer slight advantages in smoke reduction at low idle, they require complex ECUs, wiring harnesses, and high-sensitivity sensors that are prone to failure in saltwater environments. The mechanical injection pump on the Weichai 6170 series propulsion engine ensures the ship keeps moving even under complete electrical failure.
Low-Speed 1200rpm vs. High-Speed 1800rpm Alternatives
Many competitive 600hp marine engines achieve their power ratings by turning at 1800 to 2100 rpm with smaller displacements. The Weichai 6-cylinder marine propulsion engine achieves 620hp at just 1200rpm. This lower rotational speed dramatically cuts down on piston linear speed, leading to lower operating temperatures, reduced friction, and a prolonged life cycle for the Weichai 6170 cylinder liner and piston rings.
Real-World Application Scenarios
The versatility of the Weichai X6170ZC620-2 makes it a preferred choice across various commercial maritime sectors. Its high torque output is ideal for vessels moving heavy loads against strong currents or dragging heavy gear.
Deep-Sea Trawlers and Commercial Fishing Vessels
For a marine diesel engine for fishing vessel applications, reliability is an absolute safety requirement. A Weichai engine for fishing boat operations or a Weichai engine for trawler fleets must run continuously for days on end. The high torque at 1200rpm allows these vessels to pull large nets efficiently without putting excessive strain on the thermal cooling loops.
Tugboats and Workboats
A Weichai 6170 series marine engine for tugboats delivers the precise bollard pull needed for harbor maneuvers and barge positioning. The continuous duty P1 rating means the engine can run at full throttle for unlimited hours per year, providing the sustained power required by a Weichai propulsion engine for workboat assignments.
Coastal Freight and Inland Waterway Shipping
Whether it is a Weichai marine engine for inland river vessel operations navigating tight river bends or a Weichai engine for coastal transport ship routes encountering rough coastal seas, this engine handles variable river currents and heavy tidal tides with ease. It is also an excellent option as a reliable Weichai engine for ferry boat applications, where adherence to daily schedules demands consistent uptime.
Lifecycle Maintenance and Genuine Spare Parts Support
To maximize the working life of your propulsion system, regular maintenance using genuine components is essential. As an established global Weichai marine engine exporter, HekoPower provides comprehensive access to factory-original parts.
Critical Components and Overhaul Kits
Over time, components in any heavy-duty work engine face natural wear. When performing routine servicing or executing a major mid-life rebuild, using genuine parts prevents premature failures. HekoPower stocks the complete range of essential components:
- Weichai 6170 cylinder liner units with correct cross-hatch honing for optimal oil retention.
- Weichai 6170 piston kit sets balanced precisely to factory tolerances.
- Weichai 6170 injector assemblies tuned for exact pop-pressure and spray patterns.
- Weichai 6170 turbocharger replacements to maintain correct boost pressures.
- Complete Weichai marine engine overhaul kit packages containing all necessary gaskets, seals, and bearings.
Technical Advice: Weichai X6170ZC620-2 Mechanical Pump Replacement
One critical maintenance procedure on aging units is the Weichai X6170ZC620-2 mechanical pump replacement. If you notice irregular RPM hunting, excessive black smoke under load, or a drop in total power output, the fuel injection pump may require servicing or replacement.
When replacing the mechanical pump, timing alignment with the flywheel is critical. Misalignment by even a single tooth can cause retarded injection timing, leading to high exhaust gas temperatures and reduced efficiency. Always ensure the fuel supply lines are thoroughly flushed before mounting the new pump to prevent any trapped debris from damaging the new injector nozzles.
Sourcing and Procurement with HekoPower
When you choose to buy a Weichai X6170ZC620-2 through HekoPower, you are partnering with an experienced OEM Weichai marine engine supplier dedicated to reducing your fleet's downtime.
Quotation, Pricing, and Logistics
Navigating industrial engine purchases requires clear communication regarding costs and shipping timelines. We provide an upfront, transparent Weichai X6170ZC620-2 quotation tailored to your delivery port and customization needs. Our deep connection within the manufacturing supply chain allows us to offer competitive Weichai X6170ZC620-2 price structures alongside reliable Weichai X6170ZC620-2 lead time estimates, helping you keep your shipyard schedules right on track.
Complete Propulsion Solutions
HekoPower does more than just drop a box on a dock. We deliver comprehensive propulsion solutions, assisting your team in matching the Weichai X6170ZC620-2 marine engine with the correct marine gearbox ratio, shafting dimensions, and propeller pitch. This ensures your new engine transfers its full 620 horsepower into efficient forward thrust.
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 does the P1 continuous duty rating mean for the X6170ZC620-2?
The P1 rating indicates that the engine is built for continuous, non-stop operation at full rated power (620HP) without any operational time limits per year. This makes it ideal for vessels like displacement hulls, tugs, and deep-sea trawlers that require steady power for days at a time.
Is the Weichai X6170ZC620-2 compatible with older mechanical gearboxes?
Yes, due to its standardized SAE flywheel housing design and purely mechanical control structure, this engine is an excellent choice for repowering older vessels. It connects easily to a wide variety of domestic and international marine gearboxes.
Does the engine comply with IMO regulations?
Yes. The Weichai X6170ZC620-2 complies with IMO Tier II emission standards.
How does HekoPower ensure the authenticity of Weichai marine engine maintenance parts?
Every single item we supply—from a complete Weichai marine engine overhaul kit down to an individual Weichai 6170 injector—comes direct from the factory supply chain. All genuine Weichai 6170 parts carry verifiable factory serial numbers and original manufacturing holograms for absolute tracking security.
