The marine diesel engine is an internal-combustion engine designed to provide propulsion or auxiliary power for commercial and recreational vessels.
It burns diesel fuel to generate high torque, driving propellers, stern drives, or onboard generators for vessel movement and essential onboard systems.
Key Specifications
|
Model |
HD6126ZLC2 |
HD6126ZLC5 |
HD6126ZLC6 |
HD6126IZLC |
HD6126IZLC1 |
|
Type |
Water - cooled,In - line,Four - stroke,Dry cylinder liner,Direct injection |
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Rated Power/Speed (kw/r/min) |
176/1500 176/1800 |
208/2100 205/1800 |
225/2100 |
258/1800 |
288/1800 |
|
Air Intake Method |
Turbocharged Intercooled |
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Number of Cylinders |
6 |
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Bore*Stroke (mm) |
126*130 |
126*155 |
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Compression Ratio |
16:01 |
16.5:1 |
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Exhaust Temperature (°C) |
≤550 |
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Firing Order |
1-5-3-6-2-4 |
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Fuel Consumption Rate (g/kw.h) |
≤215 |
≤197 |
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Displacement (L) |
9.726 |
11.6 |
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Cooling Method |
Closed water cooling |
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Crankshaft Rotation Direction |
Counterclockwise (Viewed from the Power Output End) |
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Lubrication Method |
Pressure and Splash Combined Type |
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Starting Method |
Electric Start |
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Net Mass (kg) |
950 |
1000 |
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Engine Performance
Standard Fuel Efficiency: Specific Fuel Consumption (SFOC) ≤215 g/kW·h at rated load under ISO 3046 test conditions.
Thermal Management: Exhaust gas temperature capped at ≤550°C to protect turbocharger bearings and manifold seals from thermal fatigue.
Low-End Torque: The extended 155 mm stroke delivers high torque at lower engine speeds, improving maneuverability for heavy-displacement vessels.
Transient Emissions: Calibrated fuel-injection timing eliminates black-smoke spikes during rapid throttle changes.
Marine Gearbox & PTO
Flywheel Standards:
Standardized SAE 1 and SAE 3 flywheel options enable direct coupling to standard marine gearboxes.
Matched Transmissions:
Compatible with hydraulic marine gearboxes (Advance, Fada, or Hangzhou Gearbox) with reduction ratios from 2:1 to 5:1.
Torsional Vibration Control:
Factory-configured engine dampeners reduce drive-shaft stress and propeller shaft vibration.
Auxiliary PTO:
Front-end Power Take-Off pulley drive available for auxiliary hydraulic pumps and bilge systems.
Monitoring & Safety Systems
Instrument Panel: Real-time monitoring of engine RPM, lube oil pressure, coolant temperature, and system voltage.
Safety Alarm Thresholds: Automatic audible and visual alerts trigger for low oil pressure (<0.12 MPa) and high coolant temperature (>95°C).
Emergency Stop System: Independent solenoid-actuated air shutoff valve ensures instantaneous engine shutdown.
Speed Control Options: Mechanical governor standard, or optional electronic governor for ≤1% steady-state speed regulation under variable loads.
Factory Testing
100% Dynamometer Testing: Every engine undergoes a mandatory 2-hour full-load dyno test before packaging.
Step-Load Verification: Power output is verified sequentially at 0%, 25%, 50%, 75%, 100%, and 110% load conditions to reach thermal equilibrium.
Leak Testing: Hydrostatic pressure testing (0.4–0.6 MPa) for cooling jackets, oil galleries, and fuel lines.
Traceable QA Records: Serial-numbered Factory Acceptance Test (FAT) reports, vibration logs, and exhaust temp data retained.
Spare Parts & After-Sales Support
Essential Spare Parts: In-stock dry cylinder liners, injectors, piston rings, gaskets, and impellers ready for dispatch.
Technical Documentation: Ships with an Illustrated Parts Catalog (IPC), Operation & Maintenance Manual, and factory test certificate.
Remote Engineering Support: Dedicated technical engineering support within 24 hours via email and video link.
FAQ
Q: What is the warranty period for this marine diesel engine?
A: The standard factory warranty covers the engine for 12 months or 2,000 operating hours, whichever comes first, with extended coverage available for commercial fleet orders.
Q: What is the minimum order quantity and standard production lead time?
A: MOQ is 1 unit for standard configurations, with a production lead time of 25-35 calendar days from order confirmation, depending on gearbox pairing and instrumentation selection.
Q: What is the recommended interval before the first major overhaul (TBO)?
A: Under normal commercial marine duty cycles, the first top overhaul is recommended at approximately 8,000-10,000 operating hours, with major overhaul typically scheduled around 20,000 hours depending on fuel quality and load profile.
Q: How quickly can critical spare parts like cylinder liners or injectors be shipped for an in-service vessel?
A: In-stock components such as injectors and impellers are dispatched via air freight within 48 hours of a confirmed order; cylinder liners and larger parts typically ship within 5-7 business days depending on stock availability.
Q: Can this engine be supplied with classification society documentation for CCS, BV, or LR-classed vessels?
A: Yes, supporting documentation to meet CCS, BV, or LR classification requirements can be arranged for classed vessel installations.
