A professional who installs and repairs gasoline and diesel engines in boats, such as yachts, tugs, and trawlers, following specifications. Respnsibilities include:

• Positions engine over mounting holes, using chain hoist.
• Bolts engine to mount and straps fuel tank to cradle, using handtools.
• Connects fuel, oil, and waterlines to engine.
• Installs engine controls, propeller shaft, and propeller.
• Attaches test instruments, such as tachometer and voltmeter to engine.
• Starts engine and records operating data, such as revolutions per minute, and voltage output.
• Disassembles defective engines and repairs or replaces damaged parts, using handtools.