Gas tank for 30 hp merc 2011-4 stroke

[MANILASIY]

BASS TRACKER WITH 30 HP MERC: CANNOT PUT MORE THAN 1-2 GALS OF GAS IN TANK. ALWAYS BUBBLES UP. ENGINE RUNS FINE AND TANK WILL SETTLE TO ACCURATE READING. AIR IN THE TANK. IS THERE A VALVE THAT IS SHUT OFF AND IF SO WHERE IS IT?

THANKS, jdh

[boats.net]

If has built in gas tank and boat is 2011 as well then it has new EPA vent system and need to take it back to dealer to have vent system checked.