Cummins QSX15-C

The register lists here 113 versions with 46 to 3,245 kW rated output at 1,200 to 2,500 rpm, from four- to 18-cylinders (65 inline, 48 V-configuration) with 94 to 190 mm bore and 100 to 210 mm stroke. Maximum torque ranges from 198 to 20,564 Nm, model years from 2011 to 2026. Among the emission stages, Tier 2 leads with 52 ahead of Tier 3 with 27 and Tier 4 (Final or Phase-in) with 19 versions; the power category above 560 kW under 40 CFR 1039 is the largest group with 37 versions, showing this collective page's focus on large engines.

Cummins engines of this size power mining haul trucks, standby generator sets, locomotives and stationary power plants; in the mid power range they appear in construction machinery and large farm equipment of numerous outside brands. As one of the largest independent diesel engine makers, Cummins competes here chiefly with MTU/Rolls-Royce Power Systems and Caterpillar.

On a used purchase of the large turbocharged engines, the service history of the charge-air cooler and turbocharger matters (five different designs in the range, from Fixed to Variable Geometry), on the older Tier 2 engines without exhaust aftertreatment operating hours and oil consumption count above all, and on the newer Tier 4 versions the function of the diesel particulate filter and SCR catalyst; spare parts and service run through the worldwide Cummins dealer network.