REMOVAL & INSTALLATION
- Disconnect the two fuel lines from the fuel pump. Be sure to keep the line leading from the fuel tank up high to prevent the excess loss of fuel.
- Remove the two fuel pump mounting nuts and remove the fuel pump assembly from the side of the engine.
- Install the fuel pump in the reverse order of removal, using a new gasket and sealer on the mating surface.
The fuel pump is a mechanically operated, diaphragm type, driven by the fuel pump eccentric on the camshaft. Design of the fuel pump permits disassembly, cleaning, and repair or replacement of defective parts. The fuel pump is mounted on the right side of the cylinder block, near the front.
- Disconnect the line between the carburetor and the pump at the carburetor.
- Connect a fuel pump pressure gauge on the line.
- Start the engine. The pressure should be between 3.0 and 3.9 psi. There is usually enough gas in the float bowl to perform this test.
- If the pressure is ok, perform a capacity test. Remove the gauge from the line. Use a graduated container to catch the gas from the fuel line. Fill the carburetor float bowl with gas. Run the engine for one minute at about 1,000 rpm. The pump should deliver 1,000cc in a minute or less.