Gravely owners to service and even upgrade their engines on their own. Gravely also released an economy version of tractor in 1970, featuring a belt-driven 4-speed transmission and eight-horsepower (Kohler) engine, known as the 408. The engine was mounted at the front. This did not sell nearly as well as the popular all-gear units and was discontinued in 1977, when it was replaced with a heavy-duty professional grade of tractor known as the 900 series. Another tractor of this type, called the 9000 series was also released later that same year and replaced the 900 the following year until production ended in 1982. This tractor, much larger than the 8000 series and its predecessors, was equipped with a 27-horsepower I-4 water-cooled Continental engine. Gravely today In 2004 Gravely produced its last Gravely two-wheeled tractor. As of 2006, Gravely provided a full line of power lawn implements, including zero-turn mowers, reel mowers, and grass trimmers. In 2008, Gravely launched Gravely Turf Equipment, a division geared toward golf courses and turf management nationwide. Gravely was purchased by AriensCo located in Brillion, Wisconsin, in 1982. Today the Gravely brand operates as the commercial lawn division of AriensCo and its products continue to be sold exclusively through its dealer network. Gravely celebrated the 100th anniversary of Benjamin Gravely's plow patent in 2016. References External links Gravely official website Ariens web-site AriensCo web-site Studebaker Lawn and garden tractors