Why is it important to shut off the fuel supply during a motor fire?

Shutting off the fuel supply during a motor fire is vital to reduce the fire's intensity. When a fire occurs, the presence of fuel can sustain and even escalate the flames, potentially turning a small fire into a large, uncontrollable blaze. By cutting off the fuel supply, you eliminate one of the essential elements of fire—fuel—which can help extinguish the fire more quickly or at least limit its spread. This action reduces the risk of damage to the boat and increases the safety of all individuals on board.

Preventing contamination of the water and ensuring the boat floats better, while important considerations, are not the primary reasons for shutting off the fuel supply in the case of a fire. Likewise, while making it easier to escape may be a secondary benefit, the primary focus should always be on mitigating the fire’s intensity to protect both people and the vessel.