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Weichai 12WH17C1496-2 Marine Propulsion Engine: The Definitive 1100kW Power Solution
The maritime industry demands absolute reliability, uncompromising fuel efficiency, and durable power under harsh open-water conditions. The Weichai 12WH17C1496-2 represents the pinnacle of modern medium speed marine diesel engine engineering. Co-developed through a strategic partnership between Weichai Power and FEV Germany, this 12-cylinder V-type engine series combines European powertrain architecture with Weichai’s world-renowned manufacturing scale.
As an authorized, premier Weichai marine power solution provider, HekoPower is proud to offer the 12WH17C1496-2 to global shipyards, fleet owners, and marine engineering firms. Delivering a rated output of 1100kW (1496 HP) at 1200 RPM, this model is purpose-built to deliver continuous, uninterrupted propulsion for heavy-duty commercial vessels. Whether you are searching for a high-performance fishing boat propulsion engine, a high-torque tugboat diesel engine, or a reliable power block for a coastal cargo vessel, HekoPower is your trusted global distributor, exporter, and technical support partner.
Tech Specs of Weichai 12WH17C1496-2
General Engine Data
Engine Model: Weichai 12WH17C1496-2
Cylinder Count: 12 Cylinders in Line
Engine Type: 4-stroke, water cooled, in-line, turbocharged and aftercooled
Total Engine Displacement: 54.48 L
Bore * Stroke: 170×220（mm）
Net weight: 5300 kg
Overall Dimension: 2256×1331×1856 (mm)
Key Performance Data
Rated Power: 1100 kW / 1496 HP
Rated Speed: 1200 RPM
Idle Speed: 650±30 RPM
Minimum fuel consumption rate: ≤200 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
Noise: ≤111 dB(A)
Technical Architecture and Core Performance Indicators
High-Rigidity Structural Framework
The engineering core of the Weichai 12WH17C1496-2 relies on structural resilience. The engine block and cylinder heads are cast from high-strength vermicular graphite iron. This advanced material provides exceptional fatigue resistance and high thermal conductivity compared to standard grey iron, enabling the engine to withstand peak firing pressures up to 170 bar without structural deformation.
Complementing this block is a premium forged steel crankshaft, high-performance wet cylinder liners, and an optimized four-valve-per-cylinder configuration. This design yields a robust dry net weight of 5300 kg within a space-efficient physical footprint of 2324 mm × 1552 mm × 1988 mm, offering an outstanding power-to-weight ratio for a medium-speed commercial marine engine.
Advanced Electronically Controlled Common Rail System
Fuel efficiency is the single most critical variable impacting modern fleet profitability. The 12WH17C1496-2 transitions away from legacy mechanical fuel pumps to a state-of-the-art high-pressure electronically controlled common rail system. Managed by Weichai’s proprietary intelligent ECU, this system optimizes injection timing, duration, and spray patterns across varying load profiles.
Coupled with an efficient pulse supercharging configuration utilizing a quad-turbocharger assembly, the engine optimizes low-end torque. It achieves an industry-leading minimum specific fuel consumption rate of ≤185 g/kW·h, while maintaining a strict oil consumption rate of ≤0.3 g/kW·h. This precise combustion control ensures the platform complies fully with IMO Tier II and China Stage II emissions benchmarks.
Technical Comparisons: Weichai vs. Global Marine Giants
Selecting an 1100kW marine propulsion engine requires evaluating capital expenditure, operational costs, maintenance patterns, and physical dimensions. The following comparison highlights how the Weichai 12WH17C1496-2 aligns with top competing models in the commercial maritime market.
Weichai 12WH17C1496-2 vs. Cummins KTA50-M2
The Cummins KTA50-M2 is a legacy high-speed reference in the 1400–1600 HP commercial vessel sector. However, notable engineering differences emerge when analyzing the two configurations:
- Engine Speed & Durability: The Cummins KTA50-M2 generates its output at 1800 RPM. In contrast, the Weichai 12WH17C1496-2 operates at a medium-speed profile of 1200 RPM. Lower rotational speeds reduce mechanical wear on pistons, bearings, and valves, allowing the Weichai engine to sustain continuous duty longer.
- Fuel Injection Technology: Many KTA50 engines still rely on mechanical unit injectors (PT fuel system). The Weichai WH17’s common-rail configuration delivers superior atomization, resulting in lower smoke opacity during transient acceleration and improved fuel economy at partial loads (70%–80% duty cycles).
Weichai 12WH17C1496-2 vs. Baudouin 12M26.2
While Baudouin is part of the Weichai Group, the 12M26.2 and 12WH17 series target distinct operational niches:
- Displacement & Torque: The Baudouin 12M26.2 is a high-speed engine platform (31.8L displacement). The Weichai 12WH17C1496-2 features a 54.48L displacement, granting it far higher raw thermal mass and a 15% torque reserve.
- Transient Torque Response: At just 50% of its rated speed, the Weichai 12WH17C1496-2 can reach 115% of its rated torque. This makes it the preferred heavy-duty option for vessels requiring superior bollard pull, such as salvage tugboats and deep-sea trawlers, whereas the Baudouin excels in lighter, high-speed applications.
Weichai 12WH17C1496-2 vs. Yanmar 6EY17W
Yanmar’s EY17W series represents the traditional Japanese medium-speed approach:
- Configuration Flexibility: The Yanmar 6EY17W achieves its power via an inline 6-cylinder layout, which increases the physical length of the engine room. Weichai's V-type 12-cylinder layout distributes the 54.48L displacement across a significantly shorter longitudinal footprint (2324 mm), giving naval architects greater design flexibility for cargo holds and fuel tanks.
- Parts Availability and Acquisition Cost: Weichai holds a distinct advantage in initial purchase price and spare parts affordability. Backed by HekoPower’s supply chain, sourcing authentic Weichai components remains highly cost-effective, lowering total cost of ownership (TCO) compared to equivalent Japanese imports.
Real-World Application Scenarios
The P1 power classification indicates that this 1100kW marine engine is rated for uninterrupted, continuous high-load operations (70% to 100% duty cycles).
Ocean-Going and Coastal Bulk Carriers
For coastal cargo ships navigating fixed maritime trade lanes, fuel efficiency is paramount. Operating at a stable 1200 RPM, the 12WH17C1496-2 allows cargo vessels to preserve fuel during long transits while maintaining excellent cruising speeds. Its compact length enables shipyards to maximize cargo hold capacity.
Deep-Sea Fishing Trawlers
Fishing boats face variable load profiles: high speed when traveling to fishing grounds, followed by extended, high-torque demands when dragging massive nets. Thanks to its 15% torque reserve and FEV-engineered high-pressure common rail system, this engine maintains consistent propulsive power even under heavy resistance, preventing RPM drops when dragging nets against strong ocean currents.
Tugboats and Offshore Support Vessels (OSVs)
Tugboats and OSVs require exceptional maneuverability and immediate low-end power. The quad-turbocharger configuration ensures rapid transient response, allowing harbor tugs to quickly ramp up bollard pull when maneuvering large container vessels. Furthermore, its low structural vibration profile reduces crew fatigue during multi-day offshore support deployments.
Operational and Maintenance Framework
Standard Maintenance & Replacement Schedule
To maximize the reliability of your Weichai 12WH17C1496-2 marine engine, operators must adhere to a structured maintenance regimen. HekoPower stocks all required genuine consumables to ensure your vessel keeps moving.
- Every 250 Operating Hours: Inspect engine oil levels and check fuel pre-filter water separators. Inspect turbocharger air intake elements.
- Every 500 Operating Hours: Replace primary fuel filters and swap out the dual switchable oil filters. Check and adjust valve clearances if necessary.
- Every 1,500 Operating Hours: Inspect the common-rail high-pressure pipes, verify zinc anode degradation in the cast-aluminum heat exchanger, and test safety shutdown alerts.
- Every 5,000 Operating Hours: Service the quad-turbocharger units, inspect fuel injector spray performance, and verify the structural integrity of the gear-driven fresh water and seawater pumps.
Overhaul Guidelines: Maximizing the 20,000-Hour Lifespan
A standout parameter of the Weichai WH17 series is its major marine diesel engine overhaul interval of ≥20,000 hours. When the engine reaches this benchmark, a scheduled top-end and bottom-end overhaul is required to restore factory tolerances:
- Cylinder Liner & Piston Service: Extract the pistons, replace the specialized three-piece piston ring set and the scraping carbon rings, and hone or replace the wet cylinder liners.
- Bearing Inspection: Replace main crankshaft bearings, thrust washers, and connecting rod journal shells.
- Every 1,500 Operating Hours: Inspect the common-rail high-pressure pipes, verify zinc anode degradation in the cast-aluminum heat exchanger, and test safety shutdown alerts.
- Cylinder Head Reconditioning: Grind valve seats, replace valve guides, and replace all internal high-pressure seals.
Weichai 12WH17 series marine diesel engine, original products from Weichai. This series mainly includes 12WH17C1224-2, 12WH17C1360-2, 12WH17C1496-2, 12WH17C1564-5, 12WH17C1700-5, 12WH17C1836-5, 12WH17C1972-5, 12WH17C2203-5.
Frequently Asked Questions (FAQ)
Is the Weichai 12WH17C1496-2 compliant with current international marine emission regulations?
Yes, the baseline engine complies with IMO Tier II and China Stage II standards. For operations inside Emission Control Areas (ECAs) requiring compliance with IMO Tier III regulations, the engine can be configured with an optional, factory-certified Selective Catalytic Reduction (SCR) exhaust aftertreatment system supplied directly by HekoPower.
What is the exact meaning behind the Weichai model designation "12WH17C1496-2"?
The designation breaks down as follows:
- 12: Represents 12 cylinders configured in a V-type block.
- WH17: Identifies the core Weichai medium-speed engine platform family (170 mm cylinder bore).
- C: Designates marine propulsion applications.
- 1496: Denotes its rated metric horsepower (1496 Ps, equivalent to 1100kW).
- -2: Specifies the rated crankshaft speed configuration of 1200 r/min.
Why should I choose a common-rail marine engine over a mechanical pump alternative?
The electronically controlled common-rail system maintains high fuel injection pressures independent of engine speed. This drastically reduces fuel consumption and exhaust smoke at lower idle speeds, ensures smooth power delivery across the entire RPM range, and provides complete engine diagnostics via integrated digital displays.
What advantages do I get by sourcing my Weichai engine through HekoPower?
As a dedicated marine power solutions supplier, HekoPower provides comprehensive lifecycle support that extends far beyond the initial sale:
- Guarantee of 100% genuine Weichai factory-new products.
- Delivery of full marine classification society certifications (such as CCS, BV, ABS, GL, and LR).
- C: Designates marine propulsion applications.
- Strategic global logistics to streamline custom clearances for international shipyards.
- Complete access to an extensive inventory of genuine spare parts (including filters, injectors, liners, and seals) alongside on-site technical troubleshooting support.
