Swagetastic
ArboristSite Lurker
This might sound silly but try a different coil just for grins and giggles, that and psi check the saw and carb just to be sure they are both sound... I had 2 saws and a golf cart that would fire and run a second or two then die. Had nice Blue spark and everything... Put new coils on them because I had nothing else to try and they fired right up and ran!