The damage ethanol is causing to boats is becoming front page news. A big article was on the front page of Saturday's Wall Street Journal.
Another article, "Ethanol May Leave Boaters High and Dry," was on the front page of the Milwaukee Journal Sentinel about a week ago:
http://www.jsonline.com/story/index.aspx?id=488180&format=printIn Wisconsin, its use has been spreading quickly into counties where the EPA does not require its use. Now stations are posting stickers on the pumps which say, "this pump
may contain up to 10% ethanol."
In Superior, ethanol stickers on pumps now indicate that regular and mid-grade have ethanol, but premium is not labeled. When I asked the clerk and he hemmed and hawed and said that he thought the premium had ethanol as well, but he didn't seem sure. So I drove on to the next station.
At the I-94 exit in Lake Mills, two out of three stations are now pumping ethanol - and this is in an area where the EPA does not require ethanol.
What's a boater to do? I guess the bottom line is to look for stations without ethanol stickers on their pumps and then ask the clerk. If you trust the clerk, then go for it.