It's also been found to be a problem with (some?) fiberglass
fuel tanks. See the link below:

http://www.findarticles.com/p/articl...1/ai_n16019367

tillius wrote:
Our state just switched from the old MTB?? additive to Ethanol. Some of
the stations have stickers on the pumps saying you should check your
boat engine to see if it can handle the ethanol blend or if it needs
some preventative maintenance before running the ethanol blended gas.

I've got an old Johnson 80 HP outboard. What do I need to check?

Till