A professional who repairs or replaces defective parts of internal combustion engines indicated on test rejection tag, using power tools and handtools. Respnsibilities include:

• Positions motor in fixture and inspects engine for cracks and missing parts, such as electrical wires and screws.
• Disassembles motor and repairs or replaces defective parts, such as water pump, carburetor, thermostat, gears, solenoids, magneto, pistons, piston rings, and crankshaft, using wrenches, screwdrivers, and wheel puller.
• Scrapes, grinds, reams, and retaps parts to obtain specified clearance between parts, using scrapers, stand grinder, taps, reamer, and micrometer.
• Adjusts points, valves, and spark plugs and verifies gaps, using feeler gauges.
• Reassembles motor for retest.
• Records motor number and repairs made.