A professional who tests operation of outboard motor in tank and repairs, adjusts, or replaces parts according to specifications and engineering requirements, using measuring instruments and handtools. Respnsibilities include:

• Lowers motor on test frame into water tank, using chain hoist, and inspects wiring, screws, plugs, and assemblies for missing or broken parts.
• Starts motor and listens to and inspects it for signs of malfunctioning, such as smoke, excessive vibration, and misfiring.
• Holds tachometer against turning shaft and reads revolutions per minute.
• Verifies timing of cam gears, idle gear, and flywheel, using stroboscope.
• Turns regulating screws on carburetor to adjust idle speed, choke, and high-low speed.
• Sets starter lock and aligns shift lever shaft with indicated marks for speeds, using gauges, screwdrivers, and wrenches.
• Measures voltage, amperage, and polarity, using ammeter, voltmeter, and polarity gauge.
• Idles motor and observes thermometer to determine effectiveness of cooling system.
• Writes test report to indicate acceptance or reason for rejection of motor.
• Oils carburetor.
• Stamps identification number on motor, using hammer and metal stamping equipment.
• May test specific aspects of engine performance, such as fuel consumption, compression, and power output, and recommend modifications to improve engine performance and be designated Life Tester, Outboard Motors.