Got a new OS .12.. I'm used to purge the engine by putting my finger on the exhaust and pulling on the string... problem is with this new engine, fuel doesn't flow to the carb!

Engine runs great (still breakin it in).. but i have to purge engine by blowing on the tube that goes to the exhaust...

does anyone have this problem as well? used to have dtx 0.18 and it purged great like this.

thanks!