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I am not familiar with the saw, but if it runs on choke then dies when you move off choke, then it is likely a fuel/air issue. Electrical, it would have to ground out the coil when on run, but not on choke. Here is the wiring and throttle control blowup.

thanks, I will check the wires. hope can fix it.

Is item 19 in the diagram a slide type switch. If so it could be mounted reversed which would make I off and O on.

I would second it as being a possible carburetor issue.

It is nearly impossible to mount the micro switch backward due the mounting bracket design.


Switch with transport cover.

I fixed it. the problem is 25. when the choke switch to I, The 25 is too loose, can not give fuel to machine. i just put the 13 the lowest location a little higher to use a little plastic piece to glue to the 6.
anyway, thank you everybody.