Originally Posted by
Gizmo-RCU
If it ran well before, try running it like I suggested. May correct it's self? Might be a little lean on the low side?
+1, many times when the diaphragms get wet with fuel after being dry for awhile they work quite well. Sounds like the engine is new to the OP though so he may not know its quirks even though he has seen it fly before.