Mechanic Simulator is a realistic simulation game that puts you in the shoes of a professional mechanic. You will be tasked with fixing a variety of vehicles, from cars and trucks to boats and planes. You will need to diagnose the problem, order the necessary parts, and then repair the vehicle
From Wikipedia
A mechanic is a skilled tradesperson who uses tools to build, maintain, or repair machinery, especially engines. Formerly, the term meant any member of the handicraft trades, but by the early 20th century, it had come to mean one who works with machinery.