Have 136 an leaking gas out exhaust an died.Took apart found impulse tube split replaced impulse an intake also oiler not working.Pulled jug an piston not bad at all.Cleaned up put back together while waiting for parts.Got parts put together an started fine an ran.Started to smoke a little so shut down.Could hear sizzling at carb pulled throttle an more sizzling gas poured out of carb tipped back towards exhaust an gas came out.When disconnecting fuel line fuel came surging out.I did empty tank before taking apart seems as though pressure in tank is that normal.If so any ideas what I do next intake an impulse still in tack.