I have a rather deadly old stihl 08s, with the correct procedure it starts and runs very well, this involves, full choke (3-4 pulls) till it burps, then pull again holding the throttle open a little with no choke. After about a minute it is warmed up enough to use.

Its a brutal saw but we are no longer able to use it for firewood since it does not have a chainbrake, a requirement by the council for use in the forestry area here.

My mobilco echo saw is another champion I have the same issue again here with lack of chainbrake.