Is anyone a small engine mechanic round here? Ive got a gravely 152z zero turn i just got on trade. It has 600 hrs. New electric fuel pump. Just cleaned the carb and fuel filter. And its like its lacking fuel. The flow is good up to the carb. It dont like to have the choke off. The idle will surge. And then when you idle it up all the way and engage the pto. It will run for a minute or so and then die out. Anyone have any ideas?