Details
Weichai X6170ZC620-5 Marine Propulsion Engine: 620HP Commercial Heavy Duty Diesel
The Weichai X6170ZC620-5 marine propulsion engine represents a critical standard in heavy-duty maritime engineering, delivering a precise 620HP (456kW) output at a rated speed of 1500RPM. Designed specifically to meet the grueling power demands of mid-sized commercial workboats, this 6-cylinder marine engine balances high-displacement mechanical reliability with modern fuel efficiency standards.
As a premier China Weichai marine engine exporter and global heavy machinery partner, HekoPower provides complete vessel propulsion integration, genuine factory warranties, and direct logistical support for the entire Weichai 6170 series propulsion lineup. This heavy-duty 27.24L marine diesel engine features a 170mm bore marine diesel engine design, utilizing a long-stroke configuration (200mm stroke) to maximize low-end torque transmission while maintaining stable operation under continuous full-load maritime duties.
Tech Specs of Weichai X6170ZC620-5
General Engine Data
Engine Model: Weichai X6170ZC620-5
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)
Technical Comparisons Within the Weichai 170 Series Platform
When managing a fleet or sourcing a powertrain configuration from a genuine Weichai X6170ZC620-5 supplier like HekoPower, comparing specific engineering variations within the Weichai 170 platform is essential. The series shares fundamental structural dimensions, but the X6170ZC620-5 uses distinct performance tuning that separates it from lower-output or higher-speed variants.
Performance Separation from Low-Speed Models
Compared to the 1000RPM and 1200RPM models within the same family block, the Weichai 1500RPM marine engine features a lighter, high-velocity rotating assembly. The counterweights on the crankshaft are precision-balanced to minimize secondary harmonic vibrations at higher operating frequencies.
Lower-RPM variants deliver higher raw torque values at lower speeds, making them ideal for heavy, slow-turning displacement hulls. In contrast, the 1500RPM profile of this 620HP marine diesel engine provides a wider usable power band. This characteristic is ideal for commercial vessels that require rapid speed changes, responsive acceleration, and agile maneuvering through narrow shipping lanes or heavy currents.
Fuel Delivery Tuning and Emissions Distinctions
The X6170ZC620-5 marine propulsion engine features unique plunger profiles within its mechanical injection pump, separating it from standard land-based industrial variants. The injection nozzle spray patterns are precisely angled to match the unique air swirl velocity inside the combustion chamber of a dedicated marine engine.
Furthermore, this setup meets full Weichai IMO II marine engine environmental guidelines. The optimized compression ratio of 15.1:1 curbs peak combustion temperatures, suppressing nitrous oxide creation without requiring complex chemical exhaust after-treatment liquids. This makes it an incredibly cost-effective, self-contained propulsion asset for global commercial operators.
Real-World Application Scenarios across Commercial Vessels
The operational flexibility of the 456kW marine propulsion engine makes it a versatile choice across several commercial vessel segments. The specific torque curve and thermal management properties determine which hull configurations get the most value from this setup.
Commercial Fishing Vessel Deployments
For a commercial fishing vessel diesel engine, reliability directly impacts seasonal profitability. The X6170ZC620-5 is widely deployed in oceanic trawlers and deep-sea longliners. These ships require the engine to run multiple auxiliary hydraulic pumps off the front power take-off shaft while simultaneously turning the main propulsion shaft.
During heavy netting or trawling operations, the engine runs at full throttle for hours against major drag. The underlying cooling system uses an integrated, self-priming raw water pump alongside a large copper-alloy heat exchanger, ensuring the engine block maintains an optimal 82 degrees Celsius thermal balance even under maximum load in tropical ocean conditions.
Tugboat and Engineering Ship Operations
In demanding work environments, a 620HP continuous duty marine engine for tugboats must handle sudden, heavy load spikes. When a tugboat maneuvers a heavy cargo barge, the propulsion system experiences extreme resistance that can stall less capable engines.
The large 27.24L displacement provides exceptional torque reserve capacity. When the operator pushes the throttle forward, the engine overcomes heavy propeller loading without bogging down or blowing excessive black smoke. For engineering vessels, sand dredgers, and crane ships, this heavy-duty engine provides a reliable, steady power platform that handles fluctuating auxiliary power demands smoothly.
Cargo and Inland Waterway Shipping
For transport ships operating along coastal routes or inside extensive river networks, a marine diesel engine for inland waterway vessels must deliver consistent, long-term fuel efficiency. The X6170ZC620-5 allows cargo vessels to cruise at an economical 1200 to 1350RPM window, maintaining optimal hull speeds while burning minimal fuel.
The structural configuration uses a localized "one cylinder, one head" design. If an unexpected mechanical issue occurs mid-voyage, crew members can service an isolated cylinder head assembly without tearing down the entire upper intake and exhaust manifolds. This easy maintenance layout minimizes unexpected downtime and protects shipping schedules.
Comprehensive Maintenance Protocols and Genuine Parts Replacement
To ensure your investment achieves the longest operational lifespan possible, fleet managers must stick to strict, preventative maintenance routines. Because HekoPower operates as an integrated service partner, we track part lifecycles closely to prevent mechanical failures before they happen.
Lubrication and Filtration Schedules
The prolonged health of this Weichai X6170ZC620-5 marine engine depends heavily on oil film consistency across the main bearings. Operators should change the primary lubrication oil every 250 to 300 operational hours using high-grade marine diesel engine oil.
The filtration system features a duplex fuel filter housing that lets crews switch between active filter elements while the engine is running. This design allows operators to safely replace a clogged filter element during a voyage without shutting down the primary propulsion system. Air filters require regular inspection every 500 hours, especially when operating in dusty coastal industrial zones or active dredging sites.
Understanding Component Wear Lifecycles
The Weichai 6170 marine diesel overhaul interval normally occurs around the 20,000-hour milestone, provided the engine receives regular maintenance and runs on clean fuel. Ahead of this major milestone, specific wear items require scheduled inspection and replacement.
The sacrificial zinc anodes inside the raw water cooling jackets need inspection every 300 hours, and operators should replace them once they show 50% material loss to prevent galvanic corrosion inside the cooling channels. The raw water pump flexible impellers need mandatory replacement every 2,000 hours to avoid sudden rubber vane failures that can block water flow through the heat exchanger.
Sourcing Critical Components
Using low-quality aftermarket parts can cause catastrophic mechanical issues, such as cracked cylinder liners or broken valve stems. HekoPower supplies complete replacement parts for Weichai X6170ZC series engines worldwide, ensuring every component matches exact factory engineering specifications.
Key inventory assets include precision-machined piston rings, hardened valve guides, copper-lead connecting rod bearings, and complete top-end gasket kits. Keeping a basic onboard kit of critical spares—including injector nozzles, high-pressure fuel lines, and filter elements—protects your vessel against extended logistical delays.
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 are the exact structural dimensions and weight of this engine?
The Weichai X6170ZC620-5 engine dimensions feature an overall length of approximately 2350mm, a width of 1150mm, and a total height of 1700mm. The complete dry weight of the engine block assembly is roughly 3100 kilograms. These dimensions provide a compact, easily accessible layout inside standard commercial vessel engine rooms, making it an excellent option for repower projects or new hull construction.
Does this engine require specialized fuel treatments to meet IMO Tier II standards?
No, this model does not need selective catalytic reduction systems or urea fluid injections to meet environmental guidelines. It achieves official compliance through internal combustion optimizations, including precision valve timing, high-pressure mechanical injection parameters, and carefully mapped piston bowl shapes. This internal design lowers exhaust emissions while keeping the engine layout clean, simple, and affordable to maintain.
How can I request an official Weichai marine engine quotation from HekoPower?
To get pricing and current delivery schedules, contact the HekoPower commercial sales department directly through our online request system. Please share your specific hull application details, required gearbox reduction ratios, and your vessel's operating classification. Our engineering team provides custom propulsion packaging quotes, covering everything from the main engine block to matched control panels and cooling configurations.
Can the engine safely drive front-end auxiliary equipment?
Yes, the front end of the crankshaft is engineered to support auxiliary power take-off attachments. This structural design lets you drive large hydraulic pumps, high-output electrical alternators, or auxiliary fire pumps directly from the primary engine. This setup eliminates the need for standalone auxiliary diesel generator sets, saving valuable space and reducing installation costs inside smaller engine rooms.
