The Tier 4 Final 90REOZT4 and 120REOZT4 diesel-powered mobile generators from Kohler Power Systems are EPA emission certified for non-road use and equipped with a DOT-certified trailer with durable enclosure for easy maintenance. Nothing is attached to the enclosure; all wiring and connections are through the back of the unit, making it easy to remove the entire enclosure for fast engine access. Both units use John Deere Tier 4 Final 4.5L engines that help lower operating costs with efficient performance and fuel savings. The 90REOZT4 is capable of a 78-85 kW standby rating, 70-76 kW prime rating and 62-69 kW continuous rating. The 120REOZT4 achieves a 95-105 kW standby rating, 90-96 kW prime rating and 79-89 kW continuous rating. 800/544-2444; www.kohlerpower.com.