Fuel Pump: Testing and Inspection

Testing Fuel Pump

a. Pressure Test






1. Remove the air cleaner assembly. Disconnect the fuel inlet line at the carburetor. Use care to prevent combustion due to fuel spillage.
2. Connect a pressure gauge, a restrictor and flexible hoses between the fuel line and the carburetor.
3. Position the flexible hose and restrictor so that the fuel can be discharged into a suitable, graduated container.
4. Before taking a pressure reading, turn the ignition switch on and vent the system into the container by opening the hose restrictor momentarily.
4. Close the hose restrictor, allow the pressure to stabilize, and note the reading.
If the reading is not within the specification, and the fuel lines and filter are in satisfactory condition, the pump is damaged and should be replaced.
If the pump pressure is within the specifications,perform the test for volume.

Standard pressure 20-25kpa (2.8-3.6 lb/in2)

b. Volume test

Turn the ignition switch on, open the hose restrictor and expel the fuel into the container.

Volume: More than 800cc (0.8 U.S. quart, 0.7 Imp. quart) within one minute.