Motorenfabrik Hatz is a German manufacturer of diesel engines, based in Ruhstorf an der Rott, Lower Bavaria, Germany. Especially known for its small, lightweight and robust engines, the engines are mainly used in all kinds of small construction machinery, for generators or pumps History Founded in 1880 by Mathias Hatz, the company began to build engines in 1904. In 1910, Hatz began to produce hot bulb engines for stationary use. Based on that engine, the first Hatz water-cooled diesel engine, the H-series, was developed (max. power: 6 kW; engine speed: 500 rpm; weight: 430 kg). Three years later, a new plant was built at the present location and Hatz started to export engines to South America. In 1936, a two stroke engine with horizontal cylinder layout, the L2, which was especially intended for the use by the construction industry (max. power: 8 kW; engine speed: 1100 rpm; weight: 360 kg) was developed. In 1950, the first agricultural tractors were presented by Hatz. Another three years later, the first Hatz air-cooled four-stroke diesel engine was introduced, the E80 (max. power 7.5 kW; engine speed: 2000 rpm: 140 kg) which went on sale worldwide. The first high-revving diesel engine which had a housing made of light alloy, the E75 (max. power 3.5 kW), was produced from 1958 onwards. This engine, which weighed just 50 kg and ran with an engine speed of up to 3000 rpm, was the basis of the worldwide success of Hatz. In 1966, Hatz introduced the world's smallest industrial diesel engine, the E671 (max. power 2.6 kW, engine speed: 3600 rpm; weight: 34 kg). Two years later, the production of more quite small diesel engines was launched. With the “SilentPack”, a capsuled air-cooled engine which went on sale in 1978, the noise emission was reduced by 90% in comparison to a similar uncapsuled engine. At the time of the 100th anniversary of the company, the Motorenfabrik Hatz had approx. 950 employees. A compact two-cylinder engine, the 2G30 (max. power 15 kW; engine speed: 3000 rpm; weight: 85 kg) was introduced in 1986. Two years later, Hatz began with contract-manufacturing of automotive components like conrods, crankshafts, rocker arms, etc. Today, several million parts are produced for the automotive, agricultural and motorcycle industry. The B-series engines, which are still the engines with the highest production volume today, were developed and introduced in the 1990s. Engines with vertical crankshaft followed shortly