A professional who analyzes operation of diesel engines and components, such as blowers and compressors to determine performance using engineering specifications and test equipment. Respnsibilities include:

• Aligns and connects engine to test equipment, such as generator and motor control panel.
• Connects oil, fuel, and waterlines to engine.
• Attaches thermocouple wires to various parts of engine and records temperature readings of oil, water, and bearings from pyrometer.
• Holds tachometer to turning shaft to determine engine revolutions per minute at various governor settings.
• Measures pressures on compressors and blowers.
• Replaces defective parts and adjusts settings on injection pumps, timing, fuel racks, and governor, using dial indicator, micrometer, feeler gauges, and handtools.
• Logs information for engineering and inspection department.
• May disassemble and repair powerplant engines and perform field service work.