Details
Weichai 12WH17C1972-5 Marine Propulsion Engine: The Definitive Guide for Commercial Vessels
The Weichai 12WH17C1972-5 is a high-performance marine propulsion engine developed for commercial vessels requiring reliable continuous-duty power, fuel efficiency, and long service life. As a flagship model within the Weichai 12WH17 series marine engine platform, it delivers 1450kW (1972HP) at 1500rpm, making it suitable for fishing vessels, trawlers, cargo ships, offshore support vessels, patrol boats, and workboats.
Designed jointly with advanced European engineering expertise, the Weichai V12 medium speed engine incorporates a high-pressure common rail fuel system, optimized combustion technology, and a heavy-duty structural design. The engine complies with IMO Tier II emission standards, providing vessel operators with an environmentally responsible and cost-effective propulsion solution.
As a professional marine engine supplier, HekoPower provides complete sales support, spare parts supply, technical consultation, and after-sales services for the Weichai 12WH17C1972-5 marine engine, helping shipowners maximize operational efficiency and vessel uptime.
Tech Specs of Weichai 12WH17C1972-5
General Engine Data
Engine Model: Weichai 12WH17C1972-5
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: 1450 kW / 1972 HP
Rated Speed: 1500 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 Comparison with Other Marine Engine Options
When selecting a commercial vessel propulsion diesel engine, buyers often compare power output, operating costs, emissions compliance, and maintenance requirements.
Compared with Conventional Mechanical Injection Engines
Traditional marine diesel engines rely on mechanical fuel injection systems that often struggle to maintain precise fuel delivery under varying loads.
The Weichai common rail marine engine offers several advantages:
- More accurate fuel injection timing
- Improved combustion efficiency
- Lower fuel consumption
- Reduced exhaust emissions
- Better throttle response
- Improved cold-start performance
These benefits help vessel operators lower fuel expenses while maintaining reliable propulsion performance.
Compared with High-Speed Marine Engines
While high-speed engines can provide greater power density, medium-speed engines generally deliver:
- Longer service life
- Better fuel economy
- Lower maintenance costs
- Greater durability under continuous loads
The Weichai V12 marine engine balances power output and durability, making it particularly suitable for commercial marine operations that require extended operating hours.
Compared with Imported Marine Engines
Many shipowners evaluate imported European and Japanese engines against domestic alternatives.
The Weichai 12WH17 marine engine provides:
- Competitive acquisition costs
- Global spare parts availability
- Lower maintenance expenses
- International emissions compliance
- Proven performance in commercial fleets
This combination allows vessel owners to achieve a lower total cost of ownership without sacrificing operational reliability.
Weichai 12WH17 vs. Weichai 6WH17 & 8WH17
While the 6-cylinder and 8-cylinder models in the WH17 family share the same 170 mm cylinder bore, they use an in-line layout with a longer 222 mm stroke. The Weichai 12-cylinder marine diesel engine, conversely, uses a V-type block with a shorter 200 mm stroke. This fundamental architectural difference yields critical advantages:
- Footprint and Spatial Efficiency: The V12 layout keeps the engine length at just 2256 mm, significantly shorter than the 8-cylinder in-line variant (2917 mm). This frees up vital engine room space for auxiliary equipment or cargo capacity.
- Vibration and NVH Mitigation: The balancing of a 60° or 90° V12 arrangement balances out primary and secondary forces far better than an in-line 8 configuration, reducing hull resonant vibrations by over 20%.
Real-World Commercial Application Scenarios
The Weichai marine propulsion engine line is optimized for high-demand, high-load maritime operations. The 12WH17C1972-5 is uniquely suited for several commercial sectors:
Commercial Fishing Vessels and Deep-Sea Trawlers
For a marine diesel engine for trawler or marine engine for fishing vessel setups, reliability is a matter of livelihood. Operating deep-sea nets requires high torque at low speeds. The quad-turbocharging system allows fishing captains to maintain excellent bollard pull without straining the powertrain or causing excessive exhaust smoking.
Coastal Bulk Carriers and Cargo Vessels
When deployed as a propulsion engine for cargo vessel fleets, the P1 continuous duty rating shines. It can operate at 100% continuous load without time restrictions. The minimum fuel consumption rate of 185g/kWh ensures that long-distance shippers can optimize their transit margins.
Workboats, Tugboats, and Offshore Support Vessels
In challenging harbor environments, a marine main engine for workboat or offshore support vessel diesel engine application must react instantly to load changes. The engine's advanced ECU integrates with modern marine gearboxes (like the HC400 series) and controllable-pitch propellers (CPP), allowing harbor tugs and marine engine for patrol boat hulls to shift from idle to full thrust smoothly and reliably.
Preventive Maintenance, Lifespan, and Replacement Tips
HekoPower isn't just a Weichai marine engine dealer; we are committed to maximizing your equipment's uptime. The 12WH17C1972-5 features an industry-leading Weichai 12WH17 overhaul interval 20000 hours, provided that preventative maintenance schedules are strictly observed.
Maintaining the High-Pressure Common Rail System
Because the common rail system operates under high pressures, fuel purity is critical.
- Filtration Maintenance: Always use genuine Weichai fuel fine filters with integrated water-separating bowls. Inspect the primary water separator daily and replace the spin-on elements every 250 to 300 operating hours.
- Fuel Quality Assurance: Ensure that only high-grade Marine Gas Oil (MGO) or Marine Diesel Oil (MDO) meeting ISO 8217 standards is used. Contaminated fuel can cause premature injector wear and pressure dropouts in the rail line.
Lubrication System and Piston Ring Management
This engine uses a unique three piston rings + scraping carbon ring design, minimizing lube oil consumption to a low ≤ 0.3 g/kW·h.
- Oil Testing: Implement a scheduled oil analysis program every 500 hours to track iron, copper, and chromium wear particles, as well as TBN (Total Base Number) degradation.
- Component Replacement: When replacing components during mid-life inspections, always change the cylinder head gaskets and wet liner O-rings to preserve the integrity of the dual-circulation fresh/seawater cooling circuit.
Procuring Genuine Parts and Component Interchangeability
Avoid third-party components. As an authorized marine engine spare parts supplier, HekoPower recommends stocking an on-board "critical spares kit" for long voyages, including replacement common rail injectors, a backup 24V electric starter motor, fuel filter cartridges, and turbocharger repair 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 (FAQs)
What does the "-5" suffix denote in the Weichai 12WH17C1972-5 model number?
In Weichai's nomenclature, the model designation breaks down as follows: 12 represents the cylinder count; WH signifies the high-end medium-speed platform; 17 refers to the 170 mm cylinder bore; C designates a marine propulsion application; 1972 denotes the brake horsepower output (equivalent to 1450kW); and the -5 suffix explicitly specifies the 1500 rpm speed configuration matched with an electronically controlled common rail fuel injection framework.
Is the Weichai 12WH17 engine compliant with the latest global emission standards?
Yes, out of the box, it is an IMO Tier II compliant Weichai 12WH17 common rail engine (and China Stage II compliant). For operations inside strict Emission Control Areas (ECAs) requiring IMO Tier III compliance, HekoPower can supply custom, factory-engineered Selective Catalytic Reduction (SCR) exhaust after-treatment systems that reduce NOx output to meet compliant thresholds.
Why choose a medium-speed engine over a high-speed engine for a commercial vessel?
Medium-speed engines (operating between 1000–1500 rpm) feature robust, heavier blocks with larger structural margins compared to high-speed equivalents. This design supports a long 20,000-hour overhaul lifespan and continuous full-load operations (P1 rating), making it the most cost-effective and dependable option for commercial transport and fishing vessels.
How can I check the Weichai 12WH17C1972-5 price and shipping timelines?
As an established marine engine exporter and global Weichai 1450kW marine engine supplier, HekoPower provides custom quotes tailored to your project. The total Weichai 12WH17C1972-5 price varies based on optional equipment, including classification society certifications (CCS, BV, ABS), cooling configurations (keel-cooled or heat exchanger), and auxiliary power take-off (PTO) choices. Contact our technical sales division at hekopower.com today to receive a detailed quote for engines currently for sale.
