Can't get enough fuel at high throttle. Plenty of fuel flow, no bubbles, starts easy, idle and mid range fine. Has walbro WT561. Cleaned it out, blew it out, replaced parts, adjusted needle add seat. With the idle jet at 1.75 turns out (very rich) and the high speed out 2 turns, the engine will die if advanced past 3/4 throttle. High speed out to where it almost falls out, it barely run at full throttle, still lean. Any ideas? 0 hours on engine, 20x8 prop. Mounted inverted, side mount Brison muffler.