Experts:<br />I have a 40 HP Johnson 2 cycle outboard conencted to a plastic fuel tank with new hoses. The engine was tuned 2 weeks ago and when we put the boat in for the season it ran very well.<br /><br />After 2 weeks of inactivity it is very difficult to start and stalls. I suspect that this is a fuel problem and most likely moisture in the fuel. We have had a lot rain for the last two weeks. (and the Missouri fuel I purchase contains 10% ethanol.) <br /><br />The tank vent and cap were closed but somehow moisture is still getting into the fuel. I have had this problem mutiple times in the past and I need some fundamental advice about combating moisture buld up.<br /><br />Questions:<br />1). Would a metal fuel tank minimize moisture build up?<br />2). Should I install a Water Separating Fuel Filter?<br />3). Should I be adding fuel additives to eliminate moisture on an on-going basis?<br />4). Should I cover the fuel tank and engine when not in use.<br />5). Should I move to Arizona?<br /><br />Thanks! 
