Some marinas have ethanol free gas, but who knows how long the gas sits all summer (but its shelf life should be better, but the price is usually $1 more). The problem with ethanol may be compounded further with 2-stroke motors which have the oil mixed in with the gas. 4-stroke outboards and those new 2-strokes which have an oil reservoir like optimaxs & e-tecs don't have the problem of the ethanol mixing with the oil, but they still have to worry about the phase separation of the ethanol bonding with water.