Why? Ethanol is fine for your engine if you take a few precautions. I have a 1983 I/O and have been using ethanol since it came out. Replaced the fuel lines, rebuilt the carb and fuel pump and never had an issue. Engine is all original until last winter, pulled the head and did a valve job, cylinders looked like new. I do add a few oz of ethanol treatment each tankfull. I cannot for the life of me understand what all the buzz is over ethanol? It is a higher octane fuel and if you set your engine up for it, you will have fewer issues than ethanol free fuel.