I have had my share of problems, after fighting a motor that wouldn’t start or run well, I rebuilt the carburetor and found all rubber parts were hard and some cracked. I replaced them all and still had trouble with the needle sticking. I wrote Mercury and they said their motors can handle 15% ethanol. Well, we shall see because that’s what is in the plans, an increase in ethanol to 15%. Here is an article about it:
Boaters across America are upset over a Environmental Protection Agency proposal to add an additional five percent of ethanol to gasoline. Many states currently blend 10 percent ethanol into gas. Boaters say ethanol damages fuel lines and any more in the pump could create major problems….