The Kohler/Lombardini group has updated its range of air-cooled, single-cylinder diesel engines with the new KD15-440 engine—a substantially updated and rebranded version of the 15LD440 model, which is popular in numerous sectors including agriculture, construction, generating sets, and pumps. With a displacement of 441 cm³, the KD15 model is said to provide the operator with the longest time between maintenance intervals; the longevity of the new air filter is five times greater than the current version, the company claims. This is the result of a high-efficiency separator with pre-filter and an accumulated-dust drain valve in the filter itself. The increased dimensions of the cartridge and the high filtration capacity of the paper element greatly enhance engine protection, resulting in reduced maintenance costs. The new tank, with its modified components, includes a new fuel filter that is enhanced with additional pre-filter protection. The primary and safety filters, used in tandem, avoid the accidental entry of foreign particles during the fuel refilling process. The new rubber-coated recoil pulley reduces noise levels by 1 dB to improve operator comfort. The KD15-440 and KD15-440S engines will be available from October 2013, while the KD15-350 and KD15-350S models will follow in 2015.