When i start the genesis 7.7 it will idle great runs good at 1/2 to 3/4 throttle but if i run at full throttle for more than 50 yards or so it dies, acts like it runs out of fuel and wont push fuel through the line even when i hold my finger over the exaust, if i let it sit for a few minutes it starts like a champ but still does the same thing over and over, Im new at this and dont have a clue, putting in new glow plug today to try that, any more suggestions?