I HAVE A 2 YR OLD STIHL 460 CHAIN SAW THAT QUIT IDELING WHILE CUTTING FIRE WOOD. I HAD RUN THE SAW APPROX 1/2 HR BEFORE THIS HAPPENED. I REFUELED, BUT THE SAW WOULDN'T START OR EVEN FIRE. I PUT A NEW PLUG IN, MADE SURE I HAD A GOOD SPARK, & THAT FUEL WAS REACHING THE COMBUSTION CHAMBER. I TOOK THE SAW TO A FRIEND WHO WORKS ON SAWS. HE SAYS THAT THE PISTON RINGS ARE FROZEN ON THE PISTON & THAT THE CYCLINDER IS RUINED-THAT IT LOOKS LIKE UNMIXED GAS HAS BEEN RUN IN THE SAW. I KNOW FOR FACT THAT THIS DIDN'T HAPPEN. I USED THE SAME GAS IN ANOTHER SAW AFTER THIS ONE QUIT. DO YOU KNOW WHAT COULD HAVE CAUSED THIS?
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