Does anyone know if a '99 350 Mariner has fuel tank selector switches like my '99 356 has? I realize it only has two fuel tanks rather than 3, but does each engine just suck off of the tank on its side until empty? Or can you switch say, the starboard engine to suck off off the port fuel tank? I know that the genset only uses one tank (port on my boat, not sure on the Mariner).