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4BT3.9 Auxiliary

DCEC 4BT3.9 series marine auxiliary engine is a 4-cylinders in line, 3.9 liters four-strokes engine with 102mm bore and 120mm stroke. Equipped with BYC fuel pump. The prime power range of DCEC 4BT3.9 series marine auxiliary engine is 47KW to 65 KW.

DCEC marine auxiliary 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. DCEC provides both heat exchanger cooling and radiator cooling marine auxiliary engines, which mainly using for marine main generator and marine emergency generator. For the emergency generator set applications, we provide additional options for customers such as dual starter motor system (we provide both electric and spring starter motor for customers), which are required by most of international classifications. All of DCEC marine auxiliary 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 4BT3.9 Auxiliary Engine

1. Advanced design, exquisite manufacturing technology, reliable and durable, suitable for high-strength and heavy-duty operations under severe working conditions.

2. The integrated oil and water pipeline replaces the traditional hose, eliminating the hidden danger of leakage; the enhanced cooling and lubrication function effectively prolongs the service life of the engine.

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

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

4BT3.9 Mechanical Marine Auxiliary Engine

All models of DCEC 4BT3.9 Mechanical Marine Auxiliary Engine.

4BTA3.9-GM47 Auxiliary Engine

4BTA3.9-GM47 Auxiliary Engine

DCEC 4BTA3.9-GM47 marine auxiliary engine is a 4-cylinders in line, 3.9 liters four-strokes engine with 102mm bore and 120 mm stroke. Equipped with BYC A fuel pump and GAC electronic governor, engine comes with turbocharger and Water-Air Intercooler. The prime power...

4BTA3.9-GM65 Auxiliary Engine

4BTA3.9-GM65 Auxiliary Engine

DCEC 4BTA3.9-GM65 marine auxiliary engine is a 4-cylinders in line, 3.9 liters four-strokes engine with 102 mm bore and 120 mm stroke. Equipped with BYC A fuel pump and GAC electronic governor, engine comes with turbocharger and Water-Air Intercooler. The prime power...

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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

Engine Parts-Miss. Nora

Sales Director - Mr. Jasper Lee      

Service Team


Technical Service - Mr. Vin Hu

Customer Service - Mrs. Wendy Fu

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