You’ll be better off replacing it. It's an easy job. Undo the engine end. Loosen lock nuts on throttle, including the lock nut on the clevis that attaches it to the throttle arm. Chuch up the loosened engine end in your electric drill and back it loose from the clevis. Attach a line on the cockpit end and pull it out. (After all the adells, etc. are free. Attach the new cable to the string and pull it back in. Reverse process to thread it all back together. Really a pretty job.