C8.3 Industrial Cummins® Service Engine Model Product Identification Section E - Engine System Identification Page E-15 Cummins® Service Engine Model Product Identification General Information The Cummins® Service Engine Model Nomenclature procedure describes how engines are identified within Cummins service organization. This method was introduced for models after and including manufacture year 2007. Electronic engines are identified by the first two letters, either an "IS" for On-Highway automotive or "QS" for Off- Highway industrial market applications. The third letter is the engine platform designation followed by the engine liter size.
If the engine operates on a fuel type other than diesel, the type will be identified after the liter size.