The choke aint working then, and if it don't idle, then the idle screw must be the wrong one, [ if it does nowt] take it out, check it, take off carb -and looking thru from rear, screw idle screw in, it should lift the slide, , get that pilot out , it cant be clear,
The choke well [ in float bowl, ] needs cleared, blast it thru, should see fluid come thru small hole