Lesson 1/Learning Event 1
LESSON 1
FUNDAMENTALS OF GASOLINE ENGINE FUEL SYSTEMS
TASK
Describe the fundamentals of gasoline fuel systems.
CONDITIONS
Given information about the types, location, operation, and inspection of gasoline engine fuel and air system
components.
STANDARDS
Answer 70 percent of the multiple-choice test items covering fundamentals of gasoline engine fuel systems.
REFERENCES
TM 9-8000
Learning Event 1:
DESCRIBE THE COMPONENTS OF GASOLINE ENGINE FUEL SYSTEMS
The primary job of the fuel system is to supply the correct fuel-and-air mixture to the engine cylinders. To
do this job, the system must have components that will store the fuel, remove impurities, send the fuel to a
fuel-and-air mixer, meter the mixture, and send it to the separate cylinders.
Some of the components of the fuel system require very precise adjustments, and all of them require
maintenance and care. It is therefore necessary for you, as a wheeled vehicle mechanic, to understand how
each of the fuel system components works.
Although the locations of components on a wheeled vehicle may vary, each fuel system contains the same
components.
FUEL TANKS
Fuel is stored in the fuel tank. The location of the tank is not important. Heavy trucks may have fuel tanks
mounted in front of the rear wheels, and some tanks will be located under the driver's seat.
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