LT1 and LV1 are the two types of engines in the “L” series. They are both air-cooled direct injection diesel engines and are built with a cast iron crankcase for durability and have large bearing surfaces for low bearing loads and long life. They are air-cooled by means of a highly efficient flywheel mounted fan and are designed for continuous operation in ambient up to 125 degrees. They have a direct injection combustion system for easy starting and low fuel consumption and the LV1 engine includes a self vent fuel system.