Redmax EBZ8500 won't start

Hello, I have a four year old Redmax EBZ8500 backpack blower that won't start.  I replaced the carb and ignition coil and set the air gap with a business card.  I disconnected the kill switch to isolate an electrical issue.  I checked compression and it has about 125psi.  It has spark.  I checked the gas tank cap and it looks okay.  After all this it still won't start.  Any other suggestions?  I thought maybe bad timing and considering replacing the flywheel but I don't want to continue throwing parts at it.  Any suggestions would be appreciated!  Thanks!