Cummins Inc. announced Sept. 30 it received unconditional certification for its heavy-duty ISM engine from the Environmental Protection Agency (EPA).

"The ISM certification gives Cummins customers a complete line of certified and compliant heavy-duty engines to choose from, without concern for paying penalties," said Thomas Kieffer, Cummins executive director, marketing.

The heavy-duty engine is included in the Uptime Guarantee program Cummins recently announced. Under the guarantee, if any part on a customer's ISX or ISM engine fails and can't be repaired within a 24-hour period, Cummins will reimburse the costs of a rental vehicle.

The Uptime Guarantee applies to Cummins ISX and ISM engines purchased between Oct. 1, 2002, and March 31, 2003, with coverage from the date of purchase through Dec. 31, 2003.

"The ISM utilizes the same cooled exhaust gas recirculation subsystem design used on the ISX and ISB engines. This common approach provides customers with the most reliable and best performing engines in their class," said Kieffer.