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6BT5.9 Mechanical Marine Engine

DCEC 6BT5.9 series marine main engine is a 6-cylinders in line, 5.9 liters four-strokes engine with 102mm bore and 120mm stroke. DCEC series marine main engine equipped with Weifu fuel pump and RSV governor. The prime power range of DCEC 6BT5.9 series marine main engine is from 90 kW to 110 kW.

DCEC marine main engines have different configurations which have different power output, with code T in the engine model name means turbocharged engine, code TA in the engine model means turbocharge with water-air intercooler and code TAA in the engine model means turbocharge with air-air intercooler. Based on standard DCEC marine main engines, SeaMac provides both heat exchanger cooling and keel cooling marine main engines, we also provide complete propulsion system that including marine engine, gearbox, shaft, propeller as complete power system. SeaMac provides full life cycle services for all our customers, from design to power system supply, from installation to commissioning, from after-sales service training to spare parts supply, from trouble shooting to overhaul technical support. All of DCEC marine main engine are comes with dry type exhaust system, which means dry type exhaust manifold and dry type turbocharger, SeaMac provides upgrading services for water-cooled exhaust system, which modify dry type exhaust system into water-cooled exhaust system, which are quite important and often requested by passenger boat projects.

Advantages of 6BT5.9 Marine Engine

1.The integration design of cylinder block and cylinder head prevents the engine from water and oil leakage. The parts are about 40% less than engines of the same type, and the failure rate is greatly reduced.

2.Advanced design and high-quality manufacturing, adaptable to severe operating conditions, high strength, and reliable operation under heavy load.

3.The three-stage filter ensures balanced particle dispersion, protects main components of the fuel system and maximizes engine life.

4.Holset supercharger with integral wastegate offers low-speed response and dynamic performance.

6BT5.9 Mechanical Marine Main Engine

All models of DCEC 6BT5.9 Mechanical Marine Main Engine.

6BT5.9-M120 Marine Engine

6BT5.9-M120 Marine Engine

DCEC  6BT5.9-M120 marine main engine is a 6-cylinders in line, 5.9 liters four-strokes engine with 102 mm bore and 120 mm stroke. Equipped with Weifu AD fuel pump and RSV governor, engine comes with turbocharger. The prime power at 2200 RPM of DCEC  6BT5.9-M120 marine...

6BTA5.9-M150 Marine Engine

6BTA5.9-M150 Marine Engine

DCEC 6BTA5.9-M150 marine main engine is a 6-cylinders in line, 5.9 liters four-strokes engine with 102 mm bore and 120 mm stroke. Equipped with Weifu AD fuel pump and RSV governor, engine comes with turbocharger and Water-Air Intercooler. The prime power at 2200 RPM...

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Sales Team


Generator Engine - Mr. Haden Wu

Marine Engine - Mrs. Hailey Tang

Automotive Engine - Mr. Vin Hu

Industrial Engine - Miss. Bella Huang

Pump Engine - Miss. Zora Zhou

Sales Director - Mr. Jasper Lee      

Service Team


Technical Service - Mr. Vin Hu

Customer Service - Mrs. Wendy Fu

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