K Series Marine Engine(Power range:417-637 kW)
Description
The K series engine is a medium to high speed marine diesel engine developed by SDEC, relying on many years of experience in marine engine design and development, and absorbing excellent and mature technologies from both home and abroad. The marine engine can adapt to various working conditions, and features superior performance compared with similar engines in the industry. It's characterized by compact structure, high reliability, low noise, improved fuel efficiency, aesthetic appearance, and is applicable to various inland cargo ships, fishing boats, engineering ships, transportation ships, 300-600kW marine generator sets, etc
Specification
Type |
In-Line Type, Water-Cooled, 4-Stroke, Wet Cylinder Liners |
Bore/Stroke |
170x185mm |
Min. Fuel Consumption |
185g/kW.h |
Starting Method |
Air Start, Electric Start, Air/Electric Start |
Firing Sequence |
1-5-3-6-2-4 |
Noise |
≤115dB(A) |
Crankshaft Rotation Direction (facing the flywheel) |
Counterclockwise |
Cylinder No. |
6 |
Displacement |
25.2L |
Oil Consumption |
0.5g/kW.h |
Certificate |
CCS/IMO II |
Flywheel and Flywheel Housing |
SAE0#&18# |
Engine Overhaul Period |
20000h |
Dimensions (LxWxH) |
2108x1088x165mm |
Net Weight |
2850kg |
Product Parameters
Model |
Type |
Displacement (L) |
Rated Power(kW) |
Rated Power(HP) |
Speed(rpm) |
Aspiration |
Fuel Control System |
Output Interface |
Weight (kg) |
Certificate |
Emission |
SC25K880.18CA21 |
6 Cylinders / In-Line |
25.2 |
637 |
866 |
1800 |
TA |
ECU+CR |
SAE 0#/18' |
2850 |
CCS |
IMO TIER II |
SC25K800.18CA1 |
6 Cylinders / In-Line |
25.2 |
576 |
783 |
1800 |
TA |
EUP |
CCS |
IMO TIER II |
SC25K760.18CA1 |
6 Cylinders / In-Line |
25.2 |
545 |
741 |
1800 |
TA |
EUP |
CCS |
IMO TIER II |
SC25K700.18CA1 |
6 Cylinders / In-Line |
25.2 |
505 |
686 |
1800 |
TA |
EUP |
CCS |
IMO TIER II |
SC25K650.18CA1 |
6 Cylinders / In-Line |
25.2 |
468 |
636 |
1800 |
TA |
EUP |
CCS |
IMO TIER II |
SC25K600.18CA1 |
6 Cylinders / In-Line |
25.2 |
432 |
588 |
1800 |
TA |
EUP |
CCS |
IMO TIER II |
SC25K800.15CA1 |
6 Cylinders / In-Line |
25.2 |
576 |
783 |
1500 |
TA |
EUP |
CCS |
IMO TIER II |
SC25K760.15CA1 |
6 Cylinders / In-Line |
25.2 |
545 |
741 |
1500 |
TA |
EUP |
CCS |
IMO TIER II |
SC25K665.15CA1 |
6 Cylinders / In-Line |
25.2 |
480 |
652 |
1500 |
TA |
EUP |
CCS |
IMO TIER II |
SC25K620.15CA1 |
6 Cylinders / In-Line |
25.2 |
447 |
608 |
1500 |
TA |
EUP |
CCS |
IMO TIER II |
SC25K670.13CA1 |
6 Cylinders / In-Line |
25.2 |
480 |
652 |
1350 |
TA |
EUP |
CCS |
IMO TIER II |
SC25K580.13CA1 |
6 Cylinders / In-Line |
25.2 |
417 |
567 |
1350 |
TA |
EUP |
CCS |
IMO TIER II |





Features
- Manufactured according to high standards, advanced and reliable
The K series was developed strictly according to SAIC's GPDP standard process. With an integrated engine design, the marine engine comes with high-strength body and cylinder head, and forged steel crankshaft, and core components which are all supplied by well-known brands. It has an average engine overhaul period of over 20000 hours.
- Strong power and high fuel efficiency
Designed with four valves, dual turbocharged structure, fully efficient air intake, and dual electronic control unit, etc., the marine engine are available with two types including high power engine with electronically controlled high pressure common rail, and low power engine with electronically controlled pump. With wide power and torque range, the engine is applicable to various working conditions with medium and heavy load requiring high torque. The minimum fuel consumption reaches 190g/kW•h, which saves more than 10% fuel than similar products in the market.
- Strong adaptability and various configuration
Users choose different models according to different working conditions, among which 33W marine engine is suitable for high speed working conditions, and 38W is suitable for medium to low speed working conditions. Engine starting method, output interface, seawater pump with different flow rates, anti-corrosion cooling system, pre supply oil pump and other configurations are optional.
- Comfortable and environmentally friendly, superior NVH (Noise, Vibration and Harshness)
The engine has a compact structure and attractive appearance. The NVH optimization design of the engine effectively reduces vibration and noise, improving the comfort of crew and passengers.
- Long interval maintenance in a convenient manner
Due to modular design, extremely few faults will occur. The marine engine is designed with one cylinder and one head, making operation and maintenance more convenient.
Why Choose us?
- Competitive Pricing: 15-20% lower than market rates without compromising quality.
- Certified Quality: ISO 9001 certification, authorized Yuchai distributor & service provider.
- End-to-End Solutions: Design, production, installation, and after-sales support.
- Proven Expertise: Serving industries like marine, data centers, telecom, oilfields, hospitals, and government sectors. Clients include China Telecom, COSCO, etc.
- Global Reach: Products exported to Southeast Asia, Africa, the Middle East, and South America.
If you have any needs for our products, please click on our contact information, and we will provide you with comprehensive information on technology, business, after-sales, product configuration and other aspects in the most professional way!
Certifications

FAQ
Q1.What is your MOQ of this item?
A: 1 set
Q2. How long is your delivery time?
A:15-30 days after deposit received.
Q3: What is your terms of payment ?
A: T/T 30% in advance and TT 70% balance paid before shipment.
Q4: What is your warranty period?
A: Our payment terms is 1 year or 1500 running hours whichever comes first. But based on some special project, we can extended our warranty period.
Q5: Do you offer OEM service?
A: Yes
Q6:How is your package?
A:Package with standard export wooden case.
Company Profile

Shanghai Diesel Engine Co., Ltd. (SDEC), with SAIC Motor Corporation Limited as its main shareholder, is a large state-owned high tech enterprise engaged in research and development and manufacture of engines, engine parts and generator sets, possessing a state-level technical center, a postdoctoral working station, world-level automatic production lines and passage cars standards quality assurance system. Its former was Shanghai Diesel Engine Factory that was established in 1947 and was restructured into a stock-shared company in 1993 with shares of A and B.
In its more than 70 years'development, SDEC's products have been used all over the world. SDEC now has nine series of high-quality diesel and natural gas engines, i.e. M, R, H, D, C, E, G ,K and W series. These series engines with power outputs of 50 to 1,800 kW are mainly applied to trucks, buses, construction machinery, generator sets, marine application and agricultural equipment. SDEC is always devoting to constant improvement of product quality and striving to forge a quality-leading supplier of power solution of diesel and new energy in China.
About Cheongfa
Established in 2020, Yangjiang Cheongfa Marine and Genset Power Co., Ltd. specializes in R&D, production, and engineering of diesel genset/gas generator sets for global industries.
We deliver tailored solutions, including silent, containerized, trailer-mounted, and desert-optimized systems, alongside noise/vibration control and emission treatment technologies.
Trusted by clients like China Telecom, Tencent, and CNOOC, our products power sectors ranging from data centers and marine operations to healthcare and environmental protection.
With a footprint in Southeast Asia, Africa, South America, and the Middle East, Cheongfa guarantees reliability through end-to-end quality assurance from design to maintenance.