In which condition should the fuel tanks on power tools be left when not in use?

Leaving the fuel tanks on power tools full when not in use helps to prevent the condensation of moisture inside the tank, which can occur when there is air space above the fuel. This moisture can lead to fuel contamination and ultimately affect the performance of the engine or the tool. A full tank minimizes the amount of air that can enter, thereby reducing the risk of condensation and the formation of rust or corrosion inside the fuel system.

A full tank also ensures that the tool is ready for use when needed, saving time and effort that would otherwise be spent refueling. Additionally, when power tools, especially those used in the field, are stored with a full tank, they are less likely to experience evaporation of volatile components from the fuel, which can occur if left partially full.

In contrast, options suggesting other conditions, such as leaving the tank half full or almost empty, could increase the likelihood of moisture accumulation and other fuel issues, leading to potential performance problems when attempting to use the tool again. Draining the tank completely can be impractical and may also lead to issues with starting the engine later, as it will require more preparation to fuel it up again before use. Thus, a full tank is generally considered the best practice when storing power tools to maintain their