I have been doing repairs on my equipment for the past 20+ years. I have run into a problem with a couple of Redmax EBZ8500 backpack blowers. I have rebuilt dozens of these blowers successfully, but have run into the same issue with two of my blowers. I have replaced the cylinder, piston, rings, base gasket, ignition coil, carburetor, fuel delivery system, and control lever arm. Both blowers refuse to start - not even a flutter. I brought the blower to a very good repair shop. They put 4 hours into diagnosing the blower and could not get it going. It's getting spark, the fuel is making it to the intake since I can see the fuel on the intake gasket when I take the carb off. I have stripped the blower down three times and triple checked everything. Still nada! If anyone has any ideas what may be going on, I'm all ears. I have played around with this on and off since last fall and no one has a clue what it could be. Anyone?