Small Engines (Lawn Mowers, etc.): 25cc Crafstman Trimmer Spewing Oil???, oil mixture, crafstman

Question
Just mixed up a batch of 40:1 gas/oil for my trimmer.  Began trimming, it was running very rough.  It died and I noticed that there was oil spewing from the exhaust.  I've taken the muffler off and it is full of oil.  I double checked my mixture and it is right on.  Any ideas what the cause of this is?  Any help would be appreciated.

Answer
 Hello Dan:

 The Oil Mixture is Too Rich with Oil or the Carburator is Set too Rich. I Use 32:1 Ratio on All my 2 Cycle Engines. There is Some Oil from the Muffler, but Not like I was Getting with the 40:1 Ratio. Hope this Helps. Let me know what Happens, Please. Thanks.

 Good Luck

 Respectfully

 John