Final answer:
During an external inspection of an engine-driven fuel pump, one should check for fuel leaks, damage, secure mounting, and any unusual noises or vibrations.
Step-by-step explanation:
When performing an external inspection of an engine-driven fuel pump, it is crucial to visually check for several key indicators that suggest the pump is in good working order. You should look for signs of fuel leaks, which may be indicated by wet spots, or stains around the pump area. Also, inspect the pump for any cracks or damage to its body or fittings, which can compromise its integrity.
Check the security of the pump's mounting and its connections to ensure everything is tight and there are no loose components that could lead to a malfunction. Lastly, observe any unusual noises or vibrations when the engine is running, as these can be symptomatic of internal issues within the pump.
Remember that regular maintenance and external inspections are critical to the reliable operation of an engine-driven fuel pump and can help identify problems before they lead to engine failure.