ethanol blended fuel destroyed a carburetor for my outboard motor that was made in 1985. it swelled all of the o rings and seals up. i have seen the inside of carburetors eaten away by it so bad they are not salvageable. i will not argue, you can run a small engine all day on ethanol blended fuel. just dont let it sit longer than a couple months. then it can do damage especially if it is stored or left in certain places.