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Maximize Marine Power with the Weichai 8170ZC900-3 Propulsion Engine
The Weichai 8170ZC900-3 marine engine is a heavy-duty marine propulsion diesel developed for commercial vessels operating in demanding coastal and offshore environments. Rated at 900HP (661kW) at 1350rpm, this engine belongs to the proven Weichai 8170 series and features an inline 8-cylinder configuration with a displacement of 36.32 liters.
As a medium speed marine propulsion engine, the Weichai 8170ZC900-3 combines strong low-speed torque, stable fuel economy and dependable durability. These characteristics make it suitable for fishing vessels, trawlers, cargo ships, ferries, tugboats and engineering workboats that require reliable propulsion over long operating hours.
Heko Power supplies genuine Weichai marine engines, replacement parts and technical support for shipyards, vessel owners, fleet operators and marine engineering contractors worldwide.
Tech Specs of Weichai 8170ZC900-3
General Engine Data
Engine Model: Weichai 8170ZC900-3
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: 661 kW / 900 HP
Rated Speed: 1350 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: Understanding the 1350rpm Calibration
Naval architects often evaluate the specific performance profiles within the Weichai 170 series family to ensure proper hull matching. The primary area of focus centers on the Weichai 8170ZC900-3 vs 8170ZC900-5 differences. While both units generate an identical output profile of 900HP marine diesel engine capability, their delivery strategies alter their service lifetimes and wear behaviors.
Rotational Velocity and Component Lifespans
The 8170ZC900-3 achieves its 661kW marine propulsion engine rating at a conservative 1350rpm marine diesel engine speed. In contrast, the 8170ZC900-5 variants require a higher operational speed of 1500rpm to output the same power profile. By reducing the rated crankshaft rotation speed by 150rpm, the 8170ZC900-3 limits linear piston travel speeds and decreases friction throughout the valvetrain. For continuous commercial engineering vessels, this lower mechanical speed translates directly into fewer thermal cycles and reduced bearing shell wear over thousands of operational hours.
Thermal Loading Profiles
Because the 8170ZC900-3 moves a larger volume of displacement per crankshaft cycle at a lower speed, thermal stress across the internal lubricate oil gallery remains controlled. The lower combustion frequency means that the cylinder head face encounters less concentrated thermal cycling than higher-speed 1500rpm setups. This specific cooling dynamic keeps Weichai 8170ZC900-3 fuel consumption at an optimal minimum rate of 195 to 197 g/kW·h, ensuring energy conversion remains centered in torque rather than wasted heat rejection.
Operational Scenarios for Commercial Hull Forms
The power density and frame dimensions of the Weichai 8170ZC900-3 marine diesel engine make it highly adaptable across several commercial hull profiles. HekoPower configures these power plants for diverse configurations worldwide.
Deep-Sea Fishing Trawlers and Purse Seiners
For crews operating a marine engine for fishing vessel hulls or a heavy trawler boat, consistency under load is critical. Dragging massive nets creates immense hydrodynamic drag, pulling the hull down into high-load states for extended periods. The 36.32L displacement provides the continuous low-end torque required to hold steerage without stalling out the turbocharger, keeping fishing operations profitable even in heavy chop.
Coastal Cargo Fleets and Ferries
When serving as a marine engine for cargo vessel platforms or a regional ferry boat, seasonal schedule compliance relies entirely on machinery uptime. The in-line 8-cylinder layout operates with low vibration signatures, meeting Grade A structural balancing metrics. This mechanical smoothness limits long-term fatigue on hull welds and motor mounts, keeping short-sea transport vessels in active service through demanding seasonal schedules.
Harbor Tug Operations and Heavy Workboats
Maneuvering container ships requires low-speed responsiveness. As a marine engine for tug boat setups and a dedicated marine propulsion engine for workboat hulls, the 8170ZC900-3 handles rapid throttling cycles without soot loading or exhaust temp spikes. The engine's mechanical fuel pump offers immediate mechanical link response, allowing operators to execute precise close-quarters push maneuvers safely.
Fleet Maintenance Protocols and Parts Supply
Maintaining high fleet availability requires strict adherence to factory component inspections. The unique "one cylinder, one head" design of the Weichai 170 block simplifies top-end overhauls by allowing technicians to service individual components without disturbing adjacent assemblies.
Top-End Valvetrain Care
Because the Weichai 8170 series cylinder head replacement parts use an independent modular mounting configuration, mid-life valve adjustments are straightforward. Technicians should verify valve clearances every 1,500 operating hours to maintain proper seating and gas flow efficiency. Inspect the high-pressure injector nozzles for carbon buildup at matching intervals to maintain a clean spray pattern across the four-valve combustion bowl.
Filtration System Integrity
The lubrication setup uses a high-volume process that filters oil before it reaches the oil cooler assembly. Clean the centrifugal water pump vanes and check the primary oil filter elements during scheduled fluid changes every 250 to 500 operating hours. Using genuine filters prevents fine debris from entering the journal bearings, keeping the engine on track to reach its targeted 20,000-hour major overhaul lifecycle.
Procurement with HekoPower: Price and Lead Time Logistics
Navigating industrial propulsion procurement requires transparency regarding assembly schedules and transport timelines. As an established wholesale marine propulsion engine supplier, HekoPower manages every phase of manufacturing compliance and international freight routing.
Factory Customization Options
Every commercial hull requires unique interface considerations. When you buy Weichai 8170ZC900-3 engine assets from HekoPower, our engineering department confirms matching flywheel configurations (SAE 0 with 14-inch, 16-inch, or 18-inch options) to align seamlessly with your existing marine gearbox. We support dual starting systems, allowing the integration of a heavy-duty 11kW electric starter alongside a secondary air-start backup mechanism for emergency standby use.
Lead Times and Global Export Logistics
Our role as a comprehensive marine engine export company allows us to secure priority production allocations within China marine diesel engine manufacturer hubs. Standard packaging, assembly testing, and CCS classification society certification processes generally span a 20 to 30 working day window. HekoPower coordinates heavy-lift sea freight handling, providing full ocean manifest tracking and complete customs documentation to minimize destination port delays.
Weichai 170 series marine diesel engine, original products from Weichai. This series mainly includes X6170ZC350-1, X6170ZC408-1, X6170ZC450-1, X6170ZC540-1, X6170ZC450-2, X6170ZC480-2, X6170ZC540-2, X6170ZC620-2, X6170ZC650-2, X6170ZC580-3, X6170ZC608-3, X6170ZC680-3, X6170ZC735-3, X6170ZC620-4, X6170ZC620-5, X6170ZC550-5, X6170ZC756-5, X6170ZC818-5, 8170ZC600-1, 8170ZC720-2, 8170ZC818-3, 8170ZC900-3, 8170ZC900-5, 8170ZC1000-5.
Frequently Asked Questions
What are the exact Weichai 8170ZC900-3 dimensions and dry weight metrics?
The standard bobtail configuration for the 8-cylinder layout measures approximately 2650 mm in length, 1040 mm in width, and 1818 mm in height. The base dry weight is 3800 kg, which must be factored into your naval architect's stability and ballast calculations.
How does the engine's built-in stormy wave mode protect the vessel?
The integrated Yuanhangbao monitoring system tracks speed, water temperature, oil temperature, and line pressure in real time. If operating limits are breached under normal conditions, the engine triggers a safety shutdown. However, when the operator manually engages the stormy wave mode during heavy seas, the system switches to an alarm-only status. This ensures the propulsion engine continues running to provide critical steerage and navigation control when maneuvering through dangerous coastal breakers.
Can this engine operate safely on standard regional diesel blends?
Yes, the mechanical fuel injection system is highly resilient. It complies with international fuel quality standards including ASTM-D975 (Grades 1-D and 2-D), DIN51601, and standard commercial marine diesel lines. For operations using higher sulfur fuel classifications, oil replacement intervals must be adjusted downward to protect the cylinder liner geometry from acidic blow-by accumulation.
