The Kubota D902-EF08 and the D722 are both diesel engines produced by Kubota, but they differ significantly in specifications, performance, and applications. Below is a detailed comparison of the two engines.

Engine Specifications

Kubota D902-EF08

• Type: 3-cylinder, water-cooled diesel engine

• Displacement: 898 cc

• Power Output: 11.8 kW (approximately 16 HP) at 2300 RPM

• Torque: 40.2 Nm (29.6 lb-ft) at 1600 RPM

• Dimensions: 22.4 in (L) x 16.5 in (W) x 19.3 in (H)

• Weight: Approximately 150 kg (330 lbs)

• Fuel System: Direct injection

• Cooling System: Water-cooled

Kubota D722

• Type: 3-cylinder, water-cooled diesel engine

• Displacement: 719 cc

• Power Output: 10.5 kW (approximately 14 HP) at 2400 RPM

• Torque: 36.0 Nm (26.6 lb-ft) at 1600 RPM

• Dimensions: 20.9 in (L) x 15.4 in (W) x 18.5 in (H)

• Weight: Approximately 130 kg (287 lbs)

• Fuel System: Indirect injection

• Cooling System: Water-cooled

Performance Comparison

Power and Torque

The D902-EF08 has a slightly higher power output and torque compared to the D722. This makes the D902 more suitable for applications requiring greater power and efficiency, such as in larger machinery or equipment.

Fuel Efficiency

Both engines are designed for efficiency, but the D722, with its smaller displacement, may offer better fuel economy in lighter applications. However, the D902’s direct injection system typically provides better combustion efficiency, which can lead to improved performance under load.

Applications

Kubota D902-EF08

The D902 is often used in applications that require higher power, such as:

• Agricultural machinery

• Construction equipment

• Generators

Kubota D722

The D722 is commonly found in lighter applications, including:

• Small tractors

• Lawn and garden equipment

• Compact construction machinery

Conclusion

In summary, the Kubota D902-EF08 is a more powerful engine with a higher displacement and torque, but it is less wireless used in the market. In contrast, the D722 is a slightly smaller, lighter engine that excels in fuel efficiency for machinery and is more commonly used in the market. The choice between the two engines should be based on the specific requirements of the application, including power needs and weight considerations. In terms of compatibility with the various components in a mini excavator, the D722 fares better than the D902-EF0.