I have a 1976,55hp Johnson outboard. After i pump the fuel bulb and hit the starter my motor kicks right over. However after about 2 to 3 mins. the motor starts to die. If i pump the fuel bulb it will pick back up, and after a couple of mins it dies again. Does this sound like a fuel pump problem? Also would this pump take a Sierra 18-7820 rebuild kit. Thanks for any help.