Small Engines (Lawn Mowers, etc.): STIHL 011, vent filter, gas tank

Question
I HAVE A STIHL 011 THAT LEAKS GAS INTO THE BAR OIL . I HAVE REPLACED THE GASKET A WEEK AGO. AND THE VENT FILTER TO THE GAS TANK.RAN 4 TANKS OF GAS THOUGH IT AND IT STARTED LEAKING AGAIN.
WHAT ARE MY OTHER OPTIONS SIR.

Answer
Maurice,

I apologize for the delay in getting back to you, but I don't have any personal experience with this saw, and I don't want to "Guess".  I spoke to my friend that owns a Stihl dealership and he had no guidance for us either on this saw, since he deals primarily with the larger pro logger saws.

Please resubmit your question to one of the experts that has strength in the 2 cycle area.