I cannot get the choke to pull out.
Hello and welcome to Just Answer,
If the choke knob will not pull out then the carble is likely rusted and needs to be replaced. Check the cable by unhooking it from the connection point at the carburetor and then try to pull the cable. If the cable pulls freely when unhooked from the carburetor then the choke linkage is binding.
Owner of outdoor power equipment business, repairing all makes and models.