40hp 402 Engine hickuping and gutless

[comet424]

hi I have a 40hp 402 engine..
I put a new carb kit in... I checked the filter its clean I checked spark I got lots

but the engine doesn't wanna idle and when I rev higher in neutral she hickups kick backs and cant rev fast... what be wrong what can I do

I even adjusted the idle screw best I could do to seem to get the most rpms

here 3 videos I have made best I could do
https://www.youtube.com/watch?v=7rC3qKHBcPw
https://www.youtube.com/watch?v=fUZ4_bCM98k
https://www.youtube.com/watch?v=R7_qYOC4E-o

maybe you guys can figure whats wrong