[Uhehner]

When the crossover valve is open, the fuel line between them will act like a siphon and fuel will flow from the highest level to the lowest level tank. Both fuel gauges should read the same. With the crossover closed, the engine burning the most fuel will have the lowest tank. I always leave the crossover open. Along these lines, I NEVER have the battery switches in "both" except in an emergency. When in "both" if you have one bad battery, you will now have two dead batteries. Capt. George