Cummins 4B3.3 Power Unit

The Cummins 4B3.3 Power Unit is a highly durable and fuel-efficient 4-cylinder diesel engine designed for industrial, agricultural, construction, and stationary power applications. Built on Cummins’ proven B-Series platform, the 4B3.3 delivers reliable performance, strong torque output, and long service life in demanding operating environments.

Proven 3.3L Diesel Performance

The Cummins 4B3.3 features a 3.3-liter displacement, 4-cylinder inline configuration engineered for smooth power delivery and dependable operation. Its robust cast-iron block and heavy-duty internal components ensure durability under continuous-duty cycles.

Available in naturally aspirated and turbocharged configurations (depending on specification), the 4B3.3 provides flexible power output options suitable for various industrial requirements.

Reliable Industrial Power

Designed as a self-contained power unit, this engine is commonly supplied with radiator cooling, industrial flywheel housing, and standard SAE configurations, making integration into equipment straightforward and efficient.

It is widely used in:

Construction equipment
Agricultural machinery
Pumps and irrigation systems
Generator sets
Industrial compressors
Marine auxiliary conversions

Fuel Efficiency & Mechanical Simplicity

Equipped with a mechanical fuel injection system, the Cummins 4B3.3 offers reliable cold starting, consistent fuel delivery, and lower operating costs. Its mechanical design ensures ease of maintenance and field serviceability, even in remote job sites.

Compact & Versatile Design

The engine’s compact footprint allows installation in space-limited equipment while maintaining excellent service access. Its balanced design minimizes vibration and enhances operational stability.

Durability & Global Support

As part of the globally recognized Cummins B-Series family, the 4B3.3 benefits from:

Worldwide parts availability
Extensive service network
Proven long-term reliability
Strong resale value

Key Advantages

3.3L 4-cylinder industrial diesel engine
Strong low-end torque for heavy-duty applications
Fuel-efficient mechanical injection system
Compact and easy-to-install power unit configuration
Reliable performance in continuous-duty operations
Backed by Cummins global support network

Technical Specifications

General Information

Model: Cummins 4B3.3
Engine Type: 4-stroke inline diesel engine
Configuration: 4 cylinders, vertical inline
Aspiration: Naturally aspirated or Turbocharged (depending on version)
Application: Industrial / Power Unit

Displacement & Combustion

Displacement: 3.3 liters (3,300 cc)
Bore × Stroke: 95 mm × 115 mm
Compression Ratio: Approx. 17.5:1 (turbo) / 18.5:1 (NA)
Fuel System: Mechanical direct injection
Combustion System: Direct injection diesel

Performance

Rated Power Output: Approx. 60 – 85 HP (45 – 63 kW)
Rated Speed: 2,200 – 2,800 RPM (application dependent)
Peak Torque: Approx. 230 – 300 Nm (varies by rating)
Torque Rise: Up to 25%

Cooling & Lubrication

Cooling System: Liquid-cooled (radiator-equipped power unit)
Water Pump: Belt-driven centrifugal type
Lubrication System: Full-pressure lubrication
Oil Capacity: Approx. 8 – 10 liters

Air & Exhaust

Air Intake: Naturally aspirated or turbocharged
Exhaust System: Dry industrial exhaust manifold

Electrical System

Starting System: Electric start
Voltage: 12V or 24V (depending on configuration)
Alternator: Heavy-duty industrial alternator

Dimensions & Weight

Dry Weight: 250 – 320 kg
Overall Length: Approx. 850 – 950 mm
Width: Approx. 600 – 650 mm
Height: Approx. 800 – 900 mm

Mounting & Flywheel

Flywheel Housing: SAE standard options
Flywheel Size: SAE configurations available
Mounting Type: Industrial base / skid mount option

Cummins 4B3.3

Cummins 4B3.3 Power Unit Sale