Go to a marine store that carries Johnson Evinrude additives and get the 2+4 fuel conditioner. I run it in my outboard and never have any problems. My snowblower started coughing and spitting a little and then stalled so I put some in the tank and it smoothed right out. The ethanol is crap, I just replaced a carb on a 1 1/2 year old echo string trimmer, and found out that the small engine folks are not warranting carbs any more.
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