Originally Posted by 269Scarab

Very good information and opinions. I would like to say however that I have seen ill effects from the E10 as well as many other boaters in the Chesapeake Bay area this year.

My issue is that the new fuel has been removing varnish or other impurities from my gas tanks since I switched to E10 and thus my carb screens are constantly filling up with very fine brown residue. The tank has been drained twice and I still see residue. I can see the light at the end of the tunnel but this has been a big hassle.

By the way, no issues this year until I put my first tank of E10 in.....

Originally Posted by jbarba

Although I have heard about the problems with ethonal in marine engines that was an interesting article. Freinds & fellow boaters at our marina are complaining too of replacing fuel filters (some have been through 6 this season already), but also, they are complaining of losing at least 2-3 mph. Just dropped my boat in the water after rigging new engines, so cannot speak from experience yet, but did put octane booster in the tank yesterday just in case. Anyone else tried that, if so, any results?