What method can be used to remove water and other contaminants from the fuel tank?

Withdrawing samples until the water is gone is a method that addresses contamination in the fuel system effectively. By continuously sampling fuel from the tank, you can monitor the presence of water and other impurities. Water, being denser than fuel, will settle at the bottom of the tank. By collecting fuel from the lower part of the tank, you can systematically remove the water.

This method allows for the careful removal of contaminants without introducing further complications or risking damage to the fuel system. It ensures that only the fuel drawn from the bottom, where contaminants are most likely to settle, is removed, hence effectively purging the tank of water and other unwanted materials.

Using fuel additives, flushing with pure water, or replacing the entire tank are not practical or effective solutions for removing water. Fuel additives might help in preventing water contamination or assist in emulsion breakdown, but they do not physically remove water. Flushing the tank with pure water could introduce more contaminants and lead to a more significant problem, while replacing the entire tank is often unnecessary and costly when contaminants can be addressed through methodical sampling and withdrawal.