Those motors have an interesting fuel system because of the 2+2 operation. Maybe get a factory manual to work on your motor. Those oil pumps generally don't fail.
The idle screw is up by the recoil safety. Sounds like you need to do a link and sync> Did you verify fuel is squirting out of the primer hole in the carb?
Is the primer working? When the square Knob is pulled out all the way does the wire pull on the magneto? Is the idle screw set correctly? That Is on the recoil safety.