The new Tier 3/Stage IIIA compliant Cummins QSB engines take you to a whole new level of power, versatility and emissions control. They achieve Tier 3/Stage IIIA compliance with in-cylinder technology that maintains a compact, simple and cost-effective solution.

In fact, Cummins is so confident in our Tier 3 Quantum System engines that we cover them with an industry-leading Uptime Guarantee .

These new 4-cylinder and 6-cylinder electronic QSB diesel engines are ready when you have a tough job to do. The QSB offers major enhancements that make every piece of equipment work harder, smarter, quieter and longer. Every time.

The QSB Series is based on the highly successful B Series engines and offers power ratings from 99-275 hp (74-205 kW), an increase of up to 18%, with charge air cooling and turbocharging for strong performance. These engines combine proven full-authority electronic controls and long maintenance intervals you expect from one of the world's most successful and durable engine designs.

The QSB offers a wide range of standard features. Every QSB has improved cold-start capability and is 5-9 decibels quieter in operation than its predecessor. It runs as quietly at full load as the previous QSB did at unloaded conditions!

To ensure that every QSB is perfectly matched to every piece of equipment, Cummins PowerMatch and Advisor are ready to provide expert assistance with your spec'ing and installation process.

Every QSB engine comes with a 2-year/2,000-hour base warranty , with 3-year/10,000-hour standard protection on major components. Encompass Protection Plans , available for extended coverage, add up to seven more years of protection, including up to five years with no hourly limits.

To view and print a PDF file of our QSB brochure, click here.