Question 127Motor Plants - 1st Asst/Chief

The correct answer is C) allow excess fuel oil to return to the fuel oil system. The area designated as "L" in the illustration is the fuel return line or the overflow line. Its function is to allow any excess fuel oil that is not injected into the engine cylinders to be returned to the fuel oil system. This helps maintain the proper pressure and flow of fuel to the injection pump. The other answer choices are incorrect because: A) does not describe the function of the specific area labeled "L", B) is a different function of the fuel injection pump, and D) is not the purpose of the area labeled "L".