During fuel maintenance, what does the term 'flushing' refer to?

Flushing in the context of fuel maintenance specifically refers to the process of cleaning out old fuel from the system. This is crucial because old or contaminated fuel can lead to various operational problems, including poor engine performance, blockages in the fuel lines, and damage to fuel injectors or other system components. The flushing process typically involves removing the old fuel, cleaning the fuel tank and lines, and often replacing the old fuel with fresh fuel to ensure the system operates efficiently and reliably. This practice helps maintain the integrity of the fuel system and supports the overall health of the engine or machinery using that fuel.