hi,i have a few questions,i have a 3000 on an ace big bingo,it seems to be having a problem turning up. it only turns a topflite power point 18x8 7500 rpm,and i am not sure if the needles are set right,but it transitions great,and seems to hold it's rpm ok. but, the engine sat for a while,and i was afraid the carb was gummy,so,i had another nib 3000,and when i got the carb off of it,it had a sleeve around it,took the sleeve off,and it fits the first one,but rpm doesn't seem to be any better. it does still put out some nasty black oil on the plane as if to not be broken in fully. by the way.i am running byrons ST fuel,and for some goofy reason,it likes an idlebar plug,any help???????