help, my 99' 40hp yamaha won't idle

had carbs rebuilt a while back, i can pull the choke up to keep it to idle but when i put the choke down it stops. Also when i am going full speed, it feels like it is half, and every once in a while it kicks in and takes off then goes back to half speed? ???
thanks

21 scout w/150 yam 4str
16’ Alum. w/40 yam

how long ago did you have teh carbs gone thru, teh manufactures warn that 90 days of sitting unused is enough for harm to occur to thr carbs or fuel system

a few months ago, it has been sitting for a little while after that?

21 scout w/150 yam 4str
16’ Alum. w/40 yam

it finally died

21 scout w/150 yam 4str
16’ Alum. w/40 yam

sounds like carbs to me

I’m now at www.teamcharlestonmarine.com