The last few days I have rebuilt carburetors on four chainsaws plus new fuel lines because of this (Some I had bought recently.) They had the rubber needle tip in the carb and it melts the rubber. At the end of the year government funding(seems I read 15 Billion a year) for ethanol suppose to run out and I hope eventually that is the end of that junk. Corn was made to eat not burn in an engine. I bet that stuff has done billions worth of damage to equipment in this country alone. In the long run it is doing more damage to the environment than it is helping. Erosion of soil would have to be more and the fuel burnt by the equipment used to produce the corn was said to equal out any environmental benefit of the ethanol in the fuel. I now buy ethanol treatment for fuel I use in any small engine. I recently bought a new carburetor for and engine. It had a one year warranty and said in the paper work the use of ethanol fuels without an ethanol additive would void the warranty.