1987 foreman 350 carb question…

pretty sure this is it but just picked up a 350 4×4 and gas tank full of rust. replaced tank and cleaned out carb but wouldnt start. the pic shows what i did with the little black plunger that goes inside the bowl of the carb.

also, since ive never heard this bike run is there a standard # of turns out you would turn out the air mixture screw? (i believe its called that) it was turned out 2.5 turns from bottoming out.

thanks

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1987 foreman 350 carb question...-carb.jpg