wiff is correct, the ethanol will deteriorate the inside of the regular black rubber fuel line with time and it all usually accumulates in the carb. The company I work for has been plagued with ethanol issues for years and it isn't getting any better. The norm is ~10% ethanol in most fuels but we have reports of up to 25% from Georgia and Texas. This really has an effect on air cooled 2-cycle engines that run at high RPM's. We recommend nothing but full synthetic air cooled 2-cycle oils. There I go getting off of the subject again! Look for "Tygon" fuel line, you shouldn't have any problems.
01 Jeep XJ w/ 200,000 miles as of 3-26-11