Re: 200 efi merc+ethanol
It is a problem if you have ignored the fuel system over the years. Ethanol is an excellent fuel system cleaner so it has loosened up the crud and deposited it in the fuel filters, Buy two of each right away and keep them aboard. Better yet, drain the fuel tank through a gauze or fine mesh filter to trap as much of the stuff as you can. Change the filters and go. If the engine begins to act up, change the filters again. You may need to do this several times as it depends on how dirty the fuel system was. DO NOT continue to run a poorly running engine as it is very likely running lean and can burn a piston. Look at ethanol as doing you a favor. You will have a clean fuel system and it brought the issue to your attention early as you would have likely had a problem down the road anyway. Add a fuel stabilizer to keep fuel fresh, especially during long periods of non-use.