This Engine Test Bed is a self-contained compact unit designed for easy installation and bench mounting. The test set is supplied with, as standard, a diesel engine which is a single cylinder, four stroke; spark ignited and air-cooled. This is a typical small engine commonly used in various industrial and domestic applications throughout the world. The engine and dynamometer are carried on a solid steel base plate resiliently mounted within a steel framework. Included within the framework are the fuel system, which incorporates a fuel tanks and valves, and the air induction system. The instrumentation and control panel are mounted on the front frame. Two additional engines, a small capacity four-stroke petrol engine and a higher capacity four-stroke diesel engine, are supplied and they are easily interchangeable with the standard engine to enable characteristics comparisons on different types of engine. These two alternative engines are both air-cooled single cylinder engine type. The engines are supplied with proper adaptors for measuring of temperature at exhaust and lubrication oil tank.