Compact Power with Proven Reliability

The Cummins QSB 3.9 Pump Engine delivers dependable power and superior fuel efficiency for a wide range of pumping operations. Designed with Cummins’ advanced engineering and robust construction, this 4-cylinder engine provides smooth performance and long service life even under demanding conditions. It is ideal for agricultural irrigation, industrial water pumps, and dewatering systems that require continuous, efficient, and low-maintenance power.

Efficient Performance and Fuel Economy

The QSB 3.9 Pump Engine features a high-pressure fuel system and optimized air intake design, ensuring complete combustion and improved fuel economy. It maintains strong torque output at low speeds, making it suitable for both steady and variable load applications. The engine’s compact structure allows for easy installation and integration into different types of pump sets, saving space while maximizing performance.

Reliable Operation and Easy Maintenance

Built from durable materials, the Cummins QSB 3.9 engine offers exceptional reliability and minimal downtime. Its simple maintenance design—such as conveniently located filters and service ports—reduces operating costs and extends engine life. Advanced cooling and lubrication systems maintain stable temperature and performance even during extended use, ensuring consistent operation in all working environments.

Ideal for Various Pump Applications

The Cummins QSB 3.9 Pump Engine is widely used in construction, agriculture, and municipal water systems. Supported by Cummins’ global service network, spare parts and professional technical support are always accessible. With its proven durability, fuel efficiency, and compact power design, the QSB 3.9 engine is a trusted choice for users seeking a balance of performance and economy in their pumping equipment.