CUMMINS NTA855-M Marine Diesel Engine

The CUMMINS NTA855-M is a reliable and robust 6-cylinder, 4-stroke turbocharged marine diesel engine designed for demanding commercial and industrial marine applications. With a rated output of 350 HP (≈261 kW), this engine delivers dependable propulsion and auxiliary power for workboats, fishing vessels, tugboats, and other medium-sized commercial craft.

Built on the renowned N-Series platform, the NTA855-M combines proven diesel technology with durable construction to ensure consistent performance, fuel efficiency, and long-term reliability under continuous operation. Its turbocharged and aftercooled design enhances combustion efficiency, providing strong torque across a wide RPM range while helping reduce emissions and operating costs.

The engine features a mechanical or electronic fuel injection system that ensures precise fuel delivery, optimal throttle response, and smooth operation even under varying load conditions. Its integrated cooling and lubrication systems maintain stable operating temperatures and protect critical components from wear, reducing maintenance requirements and extending service intervals.

Designed for versatility, the CUMMINS NTA855-M is ideal for main propulsion or auxiliary power applications in commercial marine vessels. Its compact size and accessible service points simplify installation and maintenance, while Cummins extensive global parts and service network ensures operators have reliable technical support and replacement components available worldwide.

The CUMMINS NTA855-M 350 HP stands out as a dependable and efficient choice for marine operators seeking durable, high-performance diesel power in a medium-sized vessel.

Specifications:

• Engine Type: 6-cylinder, in-line, 4-stroke marine diesel

• Model: NTA855-M

• Rated Power Output: 350 HP (≈261 kW)

• Rated Speed: 1800 RPM (typical marine rating)

• Aspiration: Turbocharged and aftercooled (TA)

• Fuel System: Mechanical or electronic fuel injection

• Displacement: 14.0 liters

• Bore × Stroke: 114.3 mm × 145.1 mm (4.5 in × 5.72 in)

• Compression Ratio: Approx. 16.5:1

• Cooling System: Freshwater jacket cooling with heat exchanger; seawater loop for indirect cooling

• Lubrication System: Full-flow forced lubrication with spin-on oil filters

• Governor: Mechanical or electronic governor for load control

• Starting System: 24 V DC electric starter

• Flywheel Housing: SAE standard

• Dry Weight: Approx. 1,050–1,150 kg (engine only, depending on configuration)

• Dimensions (Approx. L × W × H): ≈1,800 × 900 × 1,200 mm

• Emission Compliance: IMO Tier II (depending on configuration)

• Exhaust Outlet: Jacketed or dry type depending on marine setup

• Applications:

  • Main propulsion for workboats, tugs, and fishing vessels

  • Auxiliary power generation in commercial vessels

  • Medium-duty continuous marine operation