The 4BTA3.9 marine engine is turbocharged and aftercooled, which enhances its power output and efficiency.
It generates a maximum power of approximately 105 horsepower (78 kW) at 2,500 revolutions per minute (RPM). The torque output of this engine is impressive as well, delivering up to 327 lb-ft (443 Nm) at 1,500 RPM. The high torque at low RPMs is particularly beneficial for marine applications, providing excellent acceleration and overall performance.
The engine is designed to withstand the harsh conditions encountered in marine environments. It features a cast iron block and cylinder head, ensuring robustness and durability. The engine's cooling system is specifically tailored for marine applications, with an efficient heat exchanger and sea water pump that effectively regulate the engine temperature.
The 4BTA3.9 marine engine incorporates a mechanical fuel injection system, which contributes to its reliability and simplicity. This system enables precise fuel delivery and ensures efficient combustion, resulting in optimal fuel economy and reduced emissions. The engine meets various emission regulations, including IMO Tier II and EPA Tier 2 standards, making it compliant with environmental requirements.
To facilitate smooth operation and user-friendly maintenance, the 4BTA3.9 engine is equipped with several features. It has a spin-on oil filter and a coolant filter, which simplify routine maintenance tasks. The engine also includes a closed crankcase ventilation system, which reduces emissions and prevents the buildup of pressure inside the engine.
In terms of dimensions, the 4BTA3.9 marine engine has a length of approximately 34 inches (864 mm), a width of 23 inches (584 mm), and a height of 38 inches (965 mm). The dry weight of the engine is around 840 pounds (381 kg), making it relatively lightweight and suitable for various marine applications.
The 4BTA3.9 marine engine can be coupled with different marine transmissions and propulsion systems, offering flexibility in vessel design and application.
Its compact size and ease of installation make it suitable for both new builds and repowering projects.
When it comes to service and support, Cummins has a global network of authorized dealers and service centers that offer expert assistance, genuine parts, and comprehensive warranty coverage. This ensures that owners of the 4BTA3.9 marine engine have access to reliable support whenever needed.
