Details
Weichai 6WH17C700-1 Marine Diesel Engine Assembly (515kW / 700HP)
As a premier, global Weichai marine engine distributor and wholesaler, HekoPower delivers the complete Weichai Marine Diesel Engine Assembly directly to shipyards, fleet operators, and commercial vessel owners. The Weichai 6WH17C700-1 represents an advanced engineering milestone in the Weichai WH17 medium speed engine family. Jointly developed by Weichai and the renowned German engineering house FEV, this 515kW marine propulsion engine is purpose-built to deliver unwavering continuous-duty power under the harshest maritime conditions.
Whether you are seeking a Weichai fishing boat engine upgrade or sourcing a massive Weichai marine main engine for a commercial fleet rollout, HekoPower provides the engineering backing, logistics networks, and genuine Weichai 6WH17 engine units to secure your investment. We export Weichai marine engines worldwide directly from China Weichai marine engine manufacturer hubs, guaranteeing competitive wholesale pricing, optimized freight handling, and certified origin documentation.
Tech Specs of Weichai 6WH17C700-1
General Engine Data
Engine Model: Weichai 6WH17C700-1
Cylinder Count: 6 Cylinders in Line
Engine Type: Inline, 4-Stroke, Water-Cooled, Direct Injection
Total Engine Displacement: 30.22 L
Bore * Stroke: 170 mm × 222 mm
Dry Weight (Engine Only): 3500 kg
Overall Dimension: 2355 mm × 1210 mm × 1615 mm
Key Performance Data
Rated Power: 515 kW / 700 HP
Rated Speed: 1000 RPM
Idle Speed: 500 RPM
Minimum fuel consumption rate: 190 g/kW.h
Oil consumption rate: ≤0.3 g/kW·h
More Technical Data
Certification: IMO Tier II / China Stage II Inland Marine
Aspiration: turbocharged and aftercooled
Starting system: Electrical
Rotation(facing the flywheel) : Counter-clockwise
Fuel system: HPCR
Power rating: P1
Technical Comparisons: 6WH17C700-1 vs. Legacy Marine Propulsion Engines
When evaluating a 700 hp marine propulsion engine 1000 rpm configuration, understanding the architectural leap from older mechanical-pump platforms is vital to analyzing long-term return on investment (ROI).
High-Pressure Common Rail vs. Mechanical Injection
The core differentiator of the Weichai common rail marine diesel engine platform is its electronic injection network. Legacy engines like the older 6170ZC or X6170 series rely on mechanical fuel pumps that distribute fuel based strictly on engine speed via a camshaft link. This results in poor atomization and incomplete combustion when operating outside a narrow RPM window.
The Weichai common rail marine engine utilizes an electronic control unit (ECU) to maintain ultra-high injection pressures regardless of engine RPM. This decoupled configuration allows for:
- Precise multi-stage injection: Splitting a single combustion stroke into pre-injection, main-injection, and post-injection phases.
- Vastly expanded economic operation zone: The engine maintains peak efficiency even when cruising at half throttle.
- Drastic emissions reduction: Seamlessly matching IMO II marine diesel engine standards without needing complex exhaust aftertreatment systems.
Common Rail vs Mechanical Fuel Injection
The electronic common rail system used in the Weichai 6WH17C700-1 Marine Diesel Engine delivers several benefits:
- More accurate fuel injection timing
- Lower fuel consumption
- Improved combustion efficiency
- Reduced smoke emissions
- Faster throttle response
- Easier compliance with emission standards
This technology helps vessel operators reduce operating costs while maintaining strong propulsion performance.
Displacement and Stroke AdvantageThe 6WH17C700-1 features an extended 222 mm stroke, pushing its total displacement to 30.22L compared to the 27.24L of older 170-series engines. This extra displacement means the engine does not have to work as hard to maintain a continuous 515kW marine propulsion engine output. By dropping the rated engine speed down to a true 1,000 RPM, structural friction is mitigated, allowing HekoPower to back an extraordinary 20,000-hour overhaul period.
Real-World Application Scenarios Across Commercial Hulls
The unique power profile of the Weichai 6WH17C700-1—generating 700HP at a steady 1000 RPM—makes it an industry-preferred main engine across a diverse spectrum of displacement and commercial workboat hulls.
High-Endurance Weichai Fishing Boat Engine Applications
For ocean-going trawlers and offshore fishing vessels navigating rough coastal waters, power predictability is a safety requirement. When dragging heavy deep-sea nets, a vessel encounters massive hydrodynamic resistance. Thanks to the integrated bleed-valve turbocharger system, the 6WH17C700-1 provides a 25% torque reserve. When the vessel drops to 50% of its rated speed while under heavy net load, the engine instantly surges to deliver 115% of its rated torque. This prevents engine lugging and ensures the captain maintains precise steering control.
Relentless Weichai Marine Engine for Cargo Vessels & Barges
Inland waterway bulk carriers, coastal cargo ships, and transport barges operate on thin margins where fuel economy dictates profitability. The Weichai 6WH17C700-1 fuel consumption spec tops out at an exceptionally lean 185 g/kW·h. By maintaining a low 1,000 RPM cruising speed, cargo vessels running this engine can trim thousands of liters of diesel from their annual operational overhead while hauling heavy bulk materials continuously along major river systems and coastal shipping tracks.
High-Load Propulsion Engine for Commercial Boats and Workboats
Harbor tugboats, engineering vessels, and marine support craft require constant directional maneuvers, moving from dead stop to high load within seconds. The rigid vermicular graphite cast iron cylinder block configuration absorbs intense explosive pressures safely, allowing workboat captains to repeatedly shift loads and execute towing maneuvers without risking thermal cracking across the cylinder liners or structural engine blocks.
Maintenance, Lifecycle Management, and Distributor Replacement Tips
As an authorized OEM Weichai marine diesel engine supplier, HekoPower does not just deliver assemblies; we manage the continuous operational integrity of your vessel. Medium-speed marine engines live and die by the rigidity of their service programs.
Essential Operational Lifecycle Maintenance Schedules
To safeguard your warranty coverage and ensure the engine safely reaches its 20,000-hour major overhaul threshold, engineers must adhere to the following strict component intervals:
- Every 250 to 500 Hours: Execute a complete engine oil change using marine-grade lubricants matched to the fuel's sulfur profile. Utilize the built-in non-stop switchable oil filters to change elements during live voyages without shutting down vessel propulsion. Clean the centrifugal oil filter rotor assemblies.
- Every 1,500 Hours: Inspect and adjust valve clearances on the 4-valve cylinder heads. Check the structural sealing of the integrated water jacket exhaust pipe system to ensure no localized heat leakage into the engine room space.
- Every 4,000 Hours: Pull, test, and calibrate the high-pressure common rail fuel injectors. Check the integrity of the anti-explosion high-pressure fuel piping lines and ensure the leak-off fuel monitoring sensors are fully operational.
- Every 8,000 Hours: Inspect the turbocharger assembly, verifying compressor wheel clearances. Check the cast aluminum heat exchanger cores and fresh-water/seawater gear-driven pump impellers for signs of cavitation or scale buildup.
Critical Sourcing: The Danger of Non-Genuine Maintenance Components
When dealing with high-pressure common rail networks running over 1,600 bar, component tolerances are measured in microns. Utilizing non-genuine filters or generic injector nozzles will result in catastrophic fuel pump failures and premature engine teardowns.
HekoPower serves as your centralized channel for a Weichai 6WH17C700-1 distributor replacement parts program. Every piston ring set (featuring the advanced 3-ring + scraping carbon ring configuration), cylinder liner, and fuel injector we supply is a certified factory original component, maintaining the exact structural metallurgy required to resist long-term thermal deformation.
Weichai 6WH17 series marine diesel engine, original products from Weichai. This series mainly includes
Technical and Procurement FAQs
Q1: What is the exact Weichai 6WH17C700-1 price and availability for export?
Because marine engine assemblies are customized based on specific vessel requirements—such as matching gearbox flanges (SAE 0/18"), choosing electric 24V or pneumatic air starting systems, and specific classification society certifications—pricing is calculated on a per-project basis. HekoPower maintains a rolling inventory of core WH17 engine blocks to ensure rapid configuration and fast global dispatch. Contact our sales office directly for an individualized wholesale quotation.
Q2: Does this engine carry a marine engine with IMO II certification out of the factory?
Yes, every Weichai 6WH17C700-1 Marine Diesel Engine supplied by HekoPower is fully compliant with IMO Tier II and China Stage II Marine emission regulations. We can provide complete type approval certificates awarded by the world’s leading classification societies, including CCS, BV, ABS, LR, DNV, and GL, depending on your flag state registry requirements.
Q3: Why should I purchase a complete engine assembly from HekoPower instead of sourcing piecemeal components?
A Genuine Weichai 6WH17C700-1 engine assembly from HekoPower ensures that all auxiliary systems—including the FEV-optimized turbocharger, original Weichai ECU, high-efficiency aluminum heat exchangers, and instrument panels—are factory-installed, balanced, and load-tested on high-precision stands. This eliminates installation alignment issues, reduces shipyard labor expenses, and ensures your complete propulsion core is backed under a single unified factory warranty.
Q4: Can HekoPower support retrofitting an older mechanical engine to the common-rail 6WH17C700-1?
Absolutely. Our engineering department specializes in repowering older vessels. The physical footprint of the 6WH17C700-1 (2355 X 1210 X 1615 mm) is highly compact, making it an ideal drop-in upgrade for older, less efficient 6170 or mechanical engines. We provide the full integration layout, including the ECU electronic harness diagrams and engine-gearbox adaptation consulting to make the transition seamless.
