Through constant research and development, Ruggerini has maintained their reputation as a provider of one of the best tailored diesel engines available, and produce 1 to 3 cylinder engines ranging from 5 HP to 42 HP. These air-cooled engines are used in industrial, agricultural, marine and fire fighting applications.Ruggerini Engines are now part of the Kohler Diesel engines family. The Ruggerini engine range now crosses over to incorporate the Kohler Diesel air cooled engine and Kohler Diesel water cooled engine range. Please refer to the Kohler Diesel page for more information on Kohler Diesel engines. All Ruggerini parts are fully interchangeable with Kohler Diesel.