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Chongqing Cummins KT19-M425 Marine Engine: Commercial Sourcing Guide
The Chongqing Cummins KT19-M425 is a heavy-duty, 19-liter, 6-cylinder in-line marine propulsion engine. Operating at a continuous duty rating of 317kW (425HP) at 1800 RPM, this mechanical diesel engine is a standard choice for high-hour commercial vessels. Unlike modern electronic powerplants, the KT19 utilizes a simple, highly reliable design optimized for continuous marine duty where failure far out at sea is not an option.
As an authorized CCEC Cummins supplier, HekoPower provides complete engine assemblies, custom marine power packs, and matching marine gearbox solutions to global shipyards and fleet operators.
Tech Specs of Cummins KT19-M425
General Engine Data
Engine Model: Cummins KT19-M425
Type: 6 Cylinders in Line
Displacement: 19 L
Bore * Stroke: 159 * 159
Net Weight (with flywheel & alternator): 1815 Kg
Overall Dimension: 1666mm*874mm*1377mm
Engine Configuration No.: D192063MX02
Key Performance Data
Rated Power: 317 kW/425HP
Rated Speed: 1800 rpm
Low Idle Speed: 675-725 rpm
High Idle Speed: 2050-2106 rpm
Rating Type: Continuous Running Power
Fuel Consumption (Running Speed): 79 L/hr
Max Torque/Speed: 1851 N.m @ 1500 rpm
More Technical Data
Certification: CCS/IMO Certificates
Governor Type: Mechanical Control
Aspiration: Turbocharged
Compression Radio: 15.5:1
Fuel System: Cummins Pressure Time (PT Pump)
Starting System: Electrical Start (24V)
Lowest Starting Temp Without auxiliary system: -12℃
Cooling Method: Sea water pump, Heat exchanger, Water cooled
Technical Comparison: KT19-M425 vs. Higher-Tuned K19 Models
Many buyers ask why they should purchase a lower-output 425HP model when the same 19-liter CCEC block can be configured as a KTA19-M500 (500HP) or KTA19-M600 (600HP). The distinction lies in the aspiration method, thermal loading, and emission tiering.
KT19-M425 vs KTA19-M500
- KT19-M425 → more stable, lower power
- KTA19-M500 → higher output, higher fuel demand
KT19-M425 vs smaller 6CTA engines
- KT19-M425 offers higher torque reserve
- better suited for heavy vessels
- longer service intervals
When KT19-M425 is the best choice
- medium-speed propulsion requirement
- long-hour operation (8–20 hours/day)
- commercial fishing or tug operations
Real Application Scenarios & Matching Propulsion Systems
Commercial Fishing Boats
For deep-sea longliners and commercial fishing trawlers, reliability takes priority over speed. The continuous marine duty rating means the engine can run at 100% load indefinitely without power degradation. HekoPower frequently configures the Cummins KT19-M425 marine engine assembly with Advance gearbox models (such as the Advance D300A or MB270A ratio sets) to deliver maximum bollard pull.
Tugboats and Workboats
Tugboats rely heavily on low-end torque to move heavy barges. The mechanical governor reacts quickly to sudden load changes when shifting or pushing. The integrated water-cooled exhaust manifold significantly lowers surface temperatures inside compact tugboat engine rooms, reducing fire hazards.
Passenger Vessels and Cargo Ships
The engine serves effectively as primary propulsion for small river cargo ships or passenger ferries. It satisfies international maritime safety regulations, delivering an official Cummins KT19-M425 datasheet PDF complete with China Classification Society (CCS) and IMO marine diesel engine emissions compliance.
Maintenance, Overhaul, and Repowering Tips
CCEC KT19-M425 Mechanical PT Pump Adjustment
The Pressure-Time (PT) fuel system relies entirely on mechanical fuel pressure and injector cam timing. If your vessel experiences black smoke or sudden power loss under load, check the mechanical governor settings first. Do not adjust the rail pressure without a proper fuel system test bench. Ensure your fuel lines handle the 237 L/hr flow loop without air leaks, which cause erratic idling between 675 and 725 RPM.
Replacing Older Marine Diesel Engines with Cummins KT19-M425
When replacing older marine diesel engines like the aging 855-series or competitor engines, confirm the foundation bed width. While the engine block itself measures 1200mm, the overall length expands to 2161.5mm once you include the flywheel housing and front PTO. Ensure your current sea chest can handle the required coolant flow of 454 Liters per minute (l/min) to the heat exchanger.
Maintenance Schedule Highlights
- Every 250 Hours: Change marine lube oil and spin-on fuel filters. Inspect the zinc anodes inside the heat exchanger to prevent saltwater corrosion.
- Every 1500 Hours: Check and adjust mechanical injector overhead settings and valve clearances.
- Typical Overhaul Interval: When maintained properly, a genuine Cummins KT19-M425 continuous duty engine routinely achieves 15,000 to 20,000 operating hours before requiring a complete frame-out overhaul.
Sourcing & Export Logistics
HekoPower ships all marine units in heavy-duty, sea-worthy standard export packaging. The total gross transport weight with structural steel skids averages 2000 KG to 2200 KG depending on the accessories selected. We handle all export customs clearances out of Chinese ports, offering transparent EXW, FOB, CFR, and CIF commercial terms to streamline your fleet upgrades.
Cummins K19-M Series (K19 Marine Engine), marine propulsion engines for commercial and recreational applications, original products from Chongqing Cummins Engine Plant(CCEC). This series mainly includes KT19-M425, KTA19-M470, KTA19-M500, KTA19-M550, KTA19-M3 (500 HP), KTA19-M3 (600 HP), KTA19-M3 (640 HP), KTA19-M4 (700 HP). All engines complete with sea water pump, heat exchanger, CCS/IMO certificates.
Frequently Asked Questions (Sourcing FAQ)
What is the exact lead time and availability for a complete KT19-M425 engine assembly?
HekoPower maintains a steady build schedule with Chongqing Cummins. The standard factory price lead time ranges from 7 to 15 working days for a standard marine engine unit. Custom configurations featuring matching propulsion shafts, gearboxes, or specific CCS certification approvals require 20 to 30 days.
Can HekoPower supply a complete marine power pack with a gearbox?
Yes. We supply the complete engine assembly integrated with China’s top gearbox brands (Advance, Fada) or international options (Twin Disc, ZF). We also supply genuine Cummins KT19-M425 spare parts—including liner kits, PT injectors, and sea water pumps—for international export from China.
Is this engine a genuine Cummins engine or a copy?
It is an original CCEC KT19-M425 engine manufactured by Chongqing Cummins Engine Company in China. This is a direct joint-venture plant utilizing identical Cummins USA engineering, machinery, and quality control systems. It is completely distinct from unlicensed aftermarket build copies.
How do I get an official Cummins KT19-M425 quotation?
Contact the HekoPower export team directly with your hull type, preferred gearbox reduction ratio, and required classification certificates (e.g., CCS, BV, ABS). We provide itemized wholesale pricing and complete logistics planning for worldwide sea freight delivery.
