Repair and adjust electrical and mechanical equipment of inboard or inboard-outboard boat engines.
<ul><li>Start motors and monitor performance for signs of malfunctioning, such as smoke, excessive vibration, or misfiring.</li><li>Document inspection and test results and work performed or to be performed.</li><li>Mount motors to boats and operate boats at various speeds on waterways to conduct operational tests.</li><li>Perform routine engine maintenance on motorboats, such as changing oil and filters.</li><li>Replace parts, such as gears, magneto points, piston rings, or spark plugs, and reassemble engines.</li><li>Repair engine mechanical equipment, such as power tilts, bilge pumps, or power take-offs.</li><li>Idle motors and observe thermometers to determine the effectiveness of cooling systems.</li><li>Adjust carburetor mixtures, electrical point settings, or timing while motors are running in water-filled test tanks.</li><li>Inspect and repair or adjust propellers or propeller shafts.</li><li>Disassemble and inspect motors to locate defective parts, using mechanic's hand tools and gauges.</li><li>Set starter locks and align and repair steering or throttle controls, using gauges, screwdrivers, or wrenches.</li><li>Adjust generators and replace faulty wiring, using hand tools and soldering irons.</li><li>Repair or rework parts, using machine tools such as lathes, mills, drills, or grinders.</li></ul>