A professional who tests, repairs, and rebuilds experimental outboard motors and parts to specified operating efficiency, using machine tools, precision measuring instruments, jigs, and fixtures. Respnsibilities include:

• Mounts motor to boat and operates boat at various speeds on waterway to conduct operational tests.
• Observes and records readings on instruments, such as tachometers, monometers, voltmeters, ammeter, and vibration analyzer to measure boat speeds and thrust forces.
• Analyzes test records and disassembles motor to remove parts needing modification.
• Operates machine tools, such as lathes, mills, drills, and grinders, to repair or rework parts, such as cams, rods, crankshaft, and propeller.