Remove muffler and drill as many 1/2'' holes as possible through the baffle (cat) plate. This opens them up nicely, cuts down on heat and allows them to flow.
You may be having the walbro hda199 carb issues, that were typical in this series of saws. If you do a search here there is lots of info.
You may be having the walbro hda199 carb issues, that were typical in this series of saws. If you do a search here there is lots of info.