What is a airlock in a petrol tank?

An airlock in a petrol tank occurs when air becomes trapped within the fuel system, preventing fuel from flowing properly to the engine. This can happen due to a variety of reasons, such as a low fuel level or improper refueling techniques. The trapped air creates a blockage, leading to difficulties in starting the engine or causing it to stall. To resolve an airlock, it may be necessary to purge the system of air, often by priming the fuel pump or using specific techniques to facilitate fuel flow.