Mark Michaud SELAUSAR
Contributor
One of the big things I have found while dealing with this, is that ethanol absorbs into fuel (rubber) lines causing them to swell. A line with, say, a 1/4" hole will swell to, say, an 1/8" hole restricting half of the fuel. A few mechanics, here, have been caught changing fuel line and charging for injector cleaning. On outboards, 2 stroke or 4 stroke, if you burn the whole tank or run it dry, ethanol will not be as dangerous. I still avoid using it because gas without ethanol is easy enough to get here. Honda has also decided to go back to running the fuel out of the motor on its updates. FWIW