Details
Weichai WP6C122-15E220 Marine Propulsion Engine (122HP / 90kW)
The Weichai WP6C122-15E220 represents the pinnacle of cost-effective engineering and robust operation in commercial maritime environments. Developed on the legendary Deutz 226B platform and refined extensively by Weichai Power, this 6-cylinder, 6.75-liter WP6C122-15 marine engine is uniquely optimized to deliver stable, high-torque output at low operational speeds. Rated at a highly stable 1500 RPM, this unit provides commercial boat operators with a perfect balance of durable service lifespan and elite fuel savings.
As a premier, global Weichai marine engine supplier and authorized Weichai marine diesel engine distributor, HekoPower delivers complete, factory-backed propulsion configurations. Whether you need a primary 1500rpm marine propulsion engine or a high-capacity marine auxiliary unit, our team provides custom matching, technical drawings, and prompt logistics to ensure seamless shipboard integration.
Tech Specs of Weichai WP6C122-15E220
General Engine Data
Engine Model: Weichai WP6C122-15E220
Cylinder Count: 6 Cylinders in Line
Engine Type: 4-stroke, water cooled, in-line, turbocharged and aftercooled
Total Engine Displacement: 6.75 L
Bore * Stroke: 105×130 (mm)
Net weight: 750 kg
Overall Dimension: 1360×890×1054 (mm)
Key Performance Data
Rated Power: 90 kW / 122 HP
Rated Speed: 1500 RPM
Idle Speed: 650±30 RPM
Minimum fuel consumption rate: 212 g/kW·h
Oil consumption rate: ≤0.2 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: ≤98dB(A)
Technical Architectural Overview & Dual-Pump Configurations
The Weichai WP6 series has undergone structural evolutionary paths to meet both mechanical simplicity requirements and modern electronic performance. Understanding the fundamental build difference of the WP6C122-15E220 diesel engine is critical for choosing the right propulsion system for your marine vessel architecture.
Understanding the WP6C122-15 Mechanical Pump Diesel Engine
The baseline version of this powertrain is engineered as a highly resilient WP6C122-15 mechanical pump diesel engine. Utilizing a heavy-duty, in-line P-type injection pump coupled with a mechanical governor, this system is favored globally in remote oceanic regions and harsh working environments. The mechanical fuel injection architecture lacks sensitive electronic boards, making it immune to electrical shorts caused by moisture or saltwater mist exposure. It allows operators to perform field overhauls using straightforward tools and remains highly tolerant to fluctuations in marine fuel oil purity and quality.
The WP6C122-15E220 Electronic Common Rail Engine
The specific WP6C122-15E220 electronic common rail engine configuration represents the modern advancement into high-pressure fuel delivery. This electronic common rail marine engine swaps the mechanical linkages for an advanced Electronic Control Unit (ECU) and a high-strength fuel rail capable of maintaining injection pressures up to 2200 bar. This precise timing system ensures that fuel is atomized perfectly into the low-vortex cylinder heads, significantly reducing smoke opacity and enhancing mid-range torque reserve by 25% to 35%. This makes it a highly desired Weichai 122HP common rail marine engine configuration for modern workboats requiring dynamic acceleration response.
Emission Compliance: IMO Tier II and China II Frameworks
Environmental standards dictate modern maritime logistics. The WP6C122-15E220 Marine Engine is built fully compliant as an IMO Tier II Weichai WP6 1500rpm engine. By adopting a specialized reentrant ω-shaped combustion chamber design, it minimizes greenhouse gas output while maintaining high thermodynamic efficiency. This environmentally compliant marine engine additionally holds China II marine engine certification and comes backed by a CCS certified marine engine document array, making it effortlessly approved for commercial river ways and coastal inspection checks globally.
Comprehensive Engineering Comparisons
To assist shipwrights and procurement managers in selecting the ideal asset from a genuine Weichai marine engine exporter like HekoPower, evaluating the engine against adjacent power options is mandatory.
Weichai WP6C122-15E220 vs. High-RPM 2100/2300 RPM Variants
The WP6 family includes configurations running up to 2300 RPM (such as the WP6C220 models). However, the Weichai 122HP Marine Engine running at 1500 RPM holds distinct structural benefits for industrial profiles:
- Component Lifespan: Lower piston speeds drastically decrease linear sleeve wear and internal bearing friction. The overhaul window expands up to 20,000 hours compared to higher-speed blocks.
- Sustained Duty: Classified firmly under the P1 Continuous Duty profile, this engine is meant to operate at 80% to 100% load continuously without requiring any power down time. Higher RPM alternatives are usually restricted to intermittent P2 or light-duty P3 cycles.
Weichai 90kW Marine Diesel Engine vs. 4-Cylinder Competitors
Some operators look at a 4-cylinder high-displacement block for a 90kW power footprint. The 6-cylinder layout of the Weichai 90kW marine diesel engine outclasses 4-cylinder blocks through superior natural dynamic balance. A 6-cylinder configuration cancels out secondary internal forces, leading to a much lower vibration profile. This reduces structural stress on the engine beds, minimizes hull resonance, and creates a quieter environment inside the boat cabin during multi-day commercial voyages.
Fleet Application Profiles & Vessel Placement
Because of its specific output structure, this Weichai marine propulsion engine works efficiently across several commercial application profiles globally.
Ideal Marine Engine for Fishing Vessels and Trawlers
The WP6C122-15E220 fishing boat engine provides the exact low-end torque required to drag weighted nets through deep water without stalling or dragging down the engine RPM. Serving as a dedicated marine engine for fishing vessels, it handles heavy auxiliary loads easily, providing continuous traction power that operators can depend on for weeks at sea.
Workboats and Inland Waterway Freight
For transport vessels navigating shallow channels or fast river flows, this unit stands out as a dependable marine diesel engine for workboats. Its compact dimensions (approximately 1350mm x 770mm x 965mm) allow it to slide easily into narrow engine rooms often found on vessels like a marine engine for inland waterways barges or a marine engine for small cargo vessels. This lets naval architects maximize dry storage hold volume without compromising hull power.
Fuel Efficiency and Thermodynamic Performance
Operational costs are directly impacted by fuel burn rates. The fuel efficient marine diesel engine architecture of the WP6 series ensures high profitability ratios for shipping networks.
Decoding the Weichai WP6C122-15E220 Fuel Consumption Spec
When studying the official Weichai WP6C122-15E220 fuel consumption spec, the flat fuel map curve becomes apparent. This model hits an optimal consumption rate of roughly 195 g/kW·h at standard cruise load. Because it is tuned as a low fuel consumption marine diesel engine, it prevents unburnt fuel drop-off even when running long periods at idle, directly eliminating fuel wash in the oil liners and ensuring a cleaner exhaust stack.
Lifecycle Maintenance, Overhauls, and Parts Support
As a full-service Weichai marine engine supplier, HekoPower does more than sell engines—we support their entire operational lifespan with deep parts availability and clear technical instruction.
Routine Preventative Inspection Schedules
To maximize the service life of your 122 hp Weichai continuous duty boat motor, execute these steps closely:
- Every 250 Hours: Swap out the primary lube oil filters and fill with high-grade CF 15W/40 marine oil. Inspect the tension on the raw water pump belt drive.
- Every 500 Hours: Replace the dual-stage spin-on fuel water separators to protect the mechanical elements or high-pressure injectors from moisture rust.
- Every 1000 Hours: Check and adjust the valve clearances (Cold state: Intake 0.2mm, Exhaust 0.3mm) to maintain optimal fuel efficiency.
Procuring Weichai 90kW Marine Engine Replacement Parts
HekoPower keeps a deep stock of genuine Weichai 90kW marine engine replacement parts. From fresh-water heat exchanger plates and replacement turbochargers to custom-matched SAE 1 flywheel housings, our components preserve the original engineering profile of your engine. Using low-grade aftermarket components can alter the injection timing or compromise cooling flow, potentially voiding your commercial insurance protections during a breakdown.
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 HekoPower an authentic exporter for the Weichai WP6 series?
Yes. HekoPower operates as a reliable Weichai marine engine supplier and experienced WP marine engine manufacturer China exporter. We supply fully certified, brand-new marine units worldwide, complete with factory documentation and warranty packages.
Can I convert an existing mechanical WP6 engine to the electronic common rail type?
While possible, converting a WP6C122-15 mechanical pump diesel engine into an electronic common rail setup requires replacing the cylinder head, wire harnesses, fuel lines, and adding an ECU module. HekoPower recommends purchasing the factory-built WP6C122-15E220 electronic common rail engine directly to guarantee reliable, long-term system integration.
What gearboxes match best with this 90kW marine propulsion engine?
The Weichai 90kW marine propulsion engine pairs perfectly with Advance/Hangzhou gearbox models (such as the 120C, 135A, or HC138 series) utilizing standard reduction ratios ranging from 2.5:1 up to 4:1 depending on your propeller profile and hull design.
How do I buy Weichai WP6C122-15E220 engines from HekoPower?
For inventory lookups, freight quotes, or to find a WP6C122-15E220 for sale, simply contact our technical sales desk via hekopower.com. Our team will put together a custom WP6C122-15E220 marine power solution spec sheet tailored to your vessel’s specific needs.
