Small Engine Troubleshooting Problems? Ask a Mechanic Now.
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Yes, there are three lines on the machine. One goes from the tank to the carburetor, one goes from the tank to the primer bulb, then one from the primer bulb to the carburetor.
The line with the fuel filter on it down inside the tank will go to the main suction fitting on the carburetor.
The line from the carburetor to the primer must be attached to the suction side of the primer bulb if hooked up wrong it will flood the carburetor when you push the primer.
Then the pressure side of the primer bulb has a line attached that goes back to the fuel tank as a return line for fuel to be pushed back to the fuel tank when the primer is pushed.