Specifications

Fuel System And Carburetor

The function of the fuel system is to store fuel/oil mixture, mix the fuel/oil with air and deliver it to the combustion

chamber. The fuel system consists of the following components:

• Fuel tank

• Fuel lines

• Fuel filter

• Carburetor

NOTE: When working on the fuel systems, look at the whole system. A problem will rarely be isolated to one

component.

Fuel system troubleshooting

When troubleshooting the fuel system, all of these steps should be followed:

NOTE: A compression test must be preformed before troubleshooting the fuel system. The fuel system will not

work properly with a compression reading less than 90 psi (6.2 bar).

1. Drain the fuel.

2. Inspect the fuel.

3. Check the fuel/oil mixture.

4. Test for alcohol.

5. Inspect the fuel filter.

6. Inspect the fuel lines.

7. Check the fuel tank vent.

8. Inspect the primer.

Inspecting the fuel

NOTE: Fuel is the maintenance item most often overlooked by consumers. A lot of fuel system problems are

caused by bad gasoline. When inspecting the fuel:

•Look for water.

• Look for dirt.

• Look for discoloration.

• Sniff carefully to see if it smells like varnish or kerosene.

• Save the fuel to show to customer.

NOTE: Save a sample of the fuel collected to show the customer.

! WARNING! WARNING

Gasoline is extremely flammable and the vapors are explosive. Avoid all sources of heat when

working on the fuel system.

CHAPTER 5: FUEL SYSTEM AND CARBURETOR

For Parts Call 606-678-9623 or 606-561-4983