Can't really help as when mine started acting up I put a weeber on it. And then when that started acting up I put a MS2 on it. I have heard that as soon as the stock carb starts acting up it pretty much is junk.
Finally fixed that biiiiatching carb, took me enough goes!
must have stripped it 5 times!
answer is clean
all the channels and jets!
change
all the seals
set the float level
change the needle
use a very good gasket sealer
use a compressor to blow out all the dirt
change the fuel filter
the carb has three levels/sections that must come apart (the bottom, middle and top)
The gasket set from Nardek worked really well.
cheers
Gavin