I have a 3 year old BG85 (very light use) that has always started and has run fine. This week, I cannot get it to run. It starts after the normal few primer pumps and then turning the choke off, like normal. But then it sputters for 3 seconds then dies. If I pump the primer bulb once every 3 seconds it continues to rough idle. As soon as I stop it dies. I dumped the tank, and refilled with fresh 89oct mix. No luck. Checked the L and H settings, and the LA, but nothing changes. Air filter is clean. I pulled the fuel line from the carb and I can blow through it easily. I pulled the filter off the tank end and pinched it closed and blew into the other end, and could not detect any leaks. Other than dropping it off at the dealer, does anyone have an idea of what might be wrong?