So, I have a 50hp Honda. When trying to crank it, the top carb floods if it is left to sit for more than two days. If I drain the top carb, crank it up again and run it at high rpm for a short time, it will quit flooding and will crank perfectly for the next day or two. From what I have read, it sounds like a needle valve problem. I have pulled the carb and checked the needle and float and both looked fine to me, but I am no mechanic. Could it be that the needle valve seats need to be polished or cleaned? Does anyone have any ideas? Thanks for any help.