Hello all, was hoping you could help. Recently replaced the primer bulb on my Stihl trimmer (old one had cracked and was leaking). I replaced the fuel that was leftover from last season (unfortunately!), have pulled the fuel lines and blew them clean, also blew the feed lines on the carb / primer clean as well. The darn thing still will not prime (no fule in the primer bulb). I'm at my wit's end with this thing. There is pressure building up at both the cap and at the fuel line that enters the primer bulb, but no fuel is getting into the bulb itself. I pulled the tank and checked the filter and that appears okay as well. I figured it was a bad gas problem, but short of pulling the carb apart to clean I think I've done everything I could. Any suggestions???? Thanks!