I have a Yd 550 series push mower (D14152AC) with a B&S motor (158cc) . It seems that when I mow it is cutting out, like its not getting any gas. I've cleaned the air filter, cleaned out gas tank, put new spark plug in and it still does it. Maybe I need a new carb. Its only approx 5 yrs old. I only use it for trimming, There might be a total of 30 hrs on it. if I replace the carb, what is the parts number, or could I buy one from you. thanks Mike