How do you check the fuel system for leaks?

To check the fuel system for leaks, it is essential to look for any visible signs that could indicate a problem. Observing wet spots underneath the fuel tank is a direct way to identify leaks, as any fuel leakage would typically result in pooling or staining on the ground. Additionally, inspecting the tank itself for cracks or damaged fittings can help to identify potential sources of leaks. These physical indicators are crucial in ensuring that the fuel system is maintaining integrity and is safe for operation.

Considering the other options, while ensuring the fuel cap is secured tightly is important for maintaining proper pressure in the fuel system, it does not directly indicate leaks. Inspecting the fuel gauge for accuracy is relevant to knowing how much fuel is onboard but does not assess the condition of the fuel system itself. Checking the fuel filter for blockages is also a good practice for ensuring fuel flow, but it does not address the issue of leaks specifically. Thus, looking for wet spots and assessing the condition of the tank and its fittings is the most comprehensive approach to checking for fuel system leaks.