Guys, need some help here. I have an F150, 4 years old. I fish private lakes that are not very big. Engine not ran hard. I have noticed that my RPM's have dropped and the engine is not idling like normal. Just started a few weeks back. I know that the GAS has been a problem around here with Ethanol and water in the gas. Engine ran at 5800 to 5900 RPM's at WOT. I am now getting 5000 to 5200 at WOT. I am not getting on plane with 2 people and full tournament load. I can't get on plane with only myself in the boat and full live-wells. I only keep 1/4 full in gas tank. Lakes are small here. Do I have bad fuel filter? Does it sound like I have water in my tank? Need some personal experience problems from you guys. What do you think I should do? I have recently changed the spark plugs and the Oil Change is one week old.