In 1959 MTD began manufacturing self-propelled lawn mowers, garden tractors and other power equipment. General mowing implements consist of lawn mowers, brush mowers, and flail mowers. Cushman produced engines for farm equipment, pumps, lawn mowers, and boats. It has also been used in outboard motors, string trimmers and lawn mowers. They are used on lawn mowers, wheelchairs, and wheelbarrows. Mulching mowers use special mulching blades which are available for rotary mowers. Lawn mowers powered by propane were also manufactured by Lehr. Their first products included steam powered lawn mowers. Internal combustion engines used with lawn mowers normally have only one cylinder. Two main styles of blades are used in lawn mowers. WORX is also known for selling items like lawn mowers and chainsaws. In his spare time, he enjoys working on lawn mowers, tractors and his motorcycles. They are still common on small engines for lawn mowers, rototillers and other equipment. Manufacture of lawn mowers took off in the 1860s. OMC was also a parent company to Ryan, which made lawn mowers.