Mine finally died permanently on wednesday morning. I left it out in the sun for no more than a couple of hours while I carted away a ute and trailorload of wood, upon getting ready to cut my next load I went to pull start it and the starter casing had gone soft enough to pull out of shape.
In the bin this one goes.

With the carb adjustment, I found the same also, it also required constant adjustment to run satisfactorily.