That advice makes me wonder; why do you not want to run ethanol? All else being equal, ethanol makes about 10% more horsepower than gasoline. Of course you have to readjust your jetting to run it. While gasoline burns best at about 14 – 1, ethanol burns best at about 6 – 1. This means you need a slightly bigger jet. I'm guessing but, if you have a .038", you may have to go do a .0382 .0383". The same thing with the low-speed jet, proportionately. Maybe one heat range colder on the plug. Just a guess.Lowest octane you can find. Non-ethanol is a plus.
You may be right about the 1%, I don't know, sounds right.You are correct Alvin. 10 percent ethanol in gasoline can potentially, theoretically, maybe make 1% more power in a 4 cycle engine. The downside is the corrosiveness the alcohol has on the gaskets, fuel bowl, fuel lines and other parts in the fuel system as opposed to non-ethanol fuel.