So what can be the problem and a saw can start only with choke on even if have cut wood and is enough hot ?
agree with this but now tell me why the saw start cold after 2-3 pulls works ok and the dificulties start when you stop the saw and try to restart it again after one minute for example ?
I have two senarios in my mind 1) leaks somewhere after the saw been hot ( seals , gaskets , intakes ) 2) not to good piston ring or piston after they cylinder became hot and expand the ring is not so good and the compression fall so the saw start dificult but maybe i am wrong in the second senario , i just make some thinks
to tell you the truth i do not believe too much in religions , but if is for repair the saw i will start a little
tomorow friend i put it in the bench i tested for leaks cold and hot , cold compression, hot compression everything i make it screws until i find what it is