ok just put a new gas tank in my boat. hooked all the lines up properly. when i prime it i can't get the primer to to harden up. if it does it wont stay that way after the motor runs for a minute and the motor stalls. if i just put the fuel line in a seperate gas tank it will run and prime and all that good stuff. maybe a vent problem? anybody have an idea? the primer is facing the correct way with the arrow towards the engine also.