Product Description

The Cummins B3.9CMII82G Marine Auxiliary Engine is a compact, fuel-efficient power solution delivering 60 kW (80 HP) at 1500 RPM. Designed for marine generator applications, it combines turbocharging with jacket-water aftercooling to maximize performance in a small footprint.

Cummins B3.9CMII82G marine power engine offers exceptional durability, ease of maintenance, and low total operating costs. Its robust design and reliable performance make it ideal for shipowners, chief engineers, and fleet managers seeking dependable auxiliary power in demanding maritime conditions.

Key Specifications

• Engine Model: Cummins B3.9CMII82G
• Prime Power: 60 kW (80 HP) @ 1500 RPM
• Overload Power: 66 kW (88 HP) – 1 hr in 12 hrs
• Configuration: 4-stroke, 4-cylinder inline
• Displacement: 3.9 L (239 in³)
• Bore × Stroke: 102 × 120 mm (4.02 × 4.72 in)
• Compression Ratio: 17.3:1
• Aspiration: Turbocharged / Jacket Water Aftercooled (JWAC)
• Fuel System: High-Pressure Common Rail (HPCR)

• Fuel Consumption:

  • 110% load: ~17.1 L/h (4.52 gal/h)
  • 100% Load: ~15.9 L/h (4.19 gal/h)
  • 75% Load: ~12.9 L/h (3.39 gal/h)

  • 50% Load: ~9.3 L/h (2.45 gal/h)

• Air Flow: ~68 L/s (144 cfm)
• Exhaust Flow: ~184 L/s (390 cfm)
• Exhaust Temperature: ~5250–537 °C (977–997 °F)
• Dry Weight: ~425 kg (937 lbs) engine only / ~516 kg (1137 lbs) with heat exchanger

Product Advantages

• Compact & Lightweight – Easy integration into tight engine rooms
• Fuel-Efficient – Reduced operating costs for continuous duty
• Durability – Built for harsh marine environments
• Global Service Network – Supported by Cummins dealers worldwide

Key Features

• High torque at rated speed for stable generator output
• Rugged construction with corrosion-resistant materials
• Optimized cooling system for extended engine life
• 10% overload capacity for short-term high demand

• Service-friendly design with easy access to maintenance points

Applications

• Marine auxiliary generator sets
• Electrical supply for cargo, fishing, and offshore vessels
• Emergency backup power for onboard systems

• Hotel loads for passenger vessels

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Each and every product manufactured is tested, inspected and is guaranteed to meet the performance specitications.