Post a picture of it and I may be able to tell you who made it for Western Auto. Most of the old Western Auto saws were made by Poulan.They should be easy enough to work on.
Before removing the plug, see if you have compression, if you have compression move on to spark. Pull the plug and let it rest against the case and see if you get a spark, if you have a spark it should be ok.
Do the usual things, clean the carby out by dismantling it and cleaning with carby cleaner and compressed air. Clean or replace the plug, even give it a shot of starting fluid or a drop or two of pre-bixed fuel down the carby, see if it fires or not.