Looking for a few suggestions for my 4200.
I finaly got the vaccum leak between the apdator and the carb fixed. I was noodling some rounds today and it was running really well. I shut it down to do some splitting, fueled the saw up and it wouldn't run off idle. I could get it to start and idle but it would just die if I gave it any throttle at all. Even gently feathering the trigger would cause it to die.
Any idea what might be going on here? The carb is an HS 168A. It has a pretty new kit in it and the fuel line has been replaced.
Check compression and if good try a new spark plug.