Hello, I bought a 2003 Key Largo 160 from my buddy it has set for 4 years, he said he put conditioner in the gas, I took it out this week and it will not rev up, I checked the gas filter and it had orange or brown stuff in the filter, I cleaned it and checked the gas supply its getting plenty of gas, I also pulled the drains in the carbs and the gas looked OK as well as I could see, could the ethanol in the gas be problem? I think the problem is in the carbs, thanks in advance.