OK I JUST GOT MY NEWELY CONVERTED 25 CC WHO KNOWS WHAT MOUNTED IN MY PLANE AND I CANT KEEP IT RUNNING IT KEEPS LOUSING FUEL PRESHURE ITS MOUNTED ON THE FRONT OF A BI PLANE I MOUNTED THE FUEL TANK IN THE COCKPIT TO TRY TO KEEP IT AS LEVEL AS POSSABLE WITH THE ENGINE BUT IT IS STILL SLIGHTLY LOWERBUT I THOUGHT WALLBRO CARBS HAD FUEL PUMPS IN THEM WHAT DO I NEED TO DO OR WHAT AM I MISSING THIS IS MY FIRST GAS MOTOR ALSO WHAT SHOULD I DO WITH THE TANK VENT LINE SHOULD I TAP THE MUFFLER OR WHAT PLEASE HELP ME !!!!! THANK YOU