When was the last time the saw has run? Definitely shouldn't be any "paste" in the inlet. I would do a little inspecting/cleaning before running it. Do a compression test and report back the results.
runs regularly but irratic idle lately so took air filter off to check it out and saw the greyish **** in carb inlet. will try to do compression test tommorow.
Might need to tear itdown and inspect also. today it stalled and wouldnt start like getting no fuel poured a little in carb and started right up ran for a minute or 2 but seemed to skip a beat between idle and full throttle and after a another minute or 2 stalled again and need fuel in carb to restart