How to Change a Mechanical Fuel Pump

If it is time to change your mechanical fuel pump, there is no need to call in a professional. If you have a little bit of mechanical ability and the right tools, you can do the job yourself and save some money. Just follow these easy steps.

Difficulty: Moderate

Instructions

Things You'll Need:

• Socket wrench
• Ratchet wrench with universal joints
• Screwdriver
• Pliers

Remove the Old

1. Disconnect the battery cables.

2. Relieve any pressure in the fuel tank by removing the fuel cap.

3. Unfasten the fuel lines from the pump. Be sure to wipe up any fuel that spills immediately.

4. Remove the bolts that are holding the pump onto the mount and remove the fuel pump.

5. Clean off any gasket residue that remains on the mating surface of the framework.

Install the New

6. Apply a layer of gasket sealer on both sides of the new gasket and put gasket over the bolts.

7. Install the new mechanical fuel pump onto the engine. The rocker arm of the pump needs to be against the eccentric inside of the engine.

8. Attach the fuel lines to the fuel pump. Reattach the lines to the carburetor. Use a wrench to make sure it is tight.

9. Reconnect the battery ground cable.

10. Start the vehicle and check for leaks.

Tips & Warnings

• Inspect the rubber fuel lines for damage. Replace them if there are any cracks or they appear brittle.
• It may be necessary to reposition the engine's pump stroke to take pressure off of the pump rod for ease of installing.
• If you notice fuel leaking after you disconnect the fuel lines, then you should crimp or plug the fuel supply line.
• Fuel is highly combustible. No smoking, open flames, or sparks around your work area while changing a mechanical fuel pump.
• Clean up any fuel spills thoroughly and immediately.