I took all the top lines off so far. On the selector side they aren't what I would call gummed up but there definitely wasn't much of an opening on the inside. I cleaned the selector out and getting ready to replace the top fuel lines or all the 5/16 diameter ones today. Looks like I have a bit more work to get the 1/4 inch lines off that run underneath to the carb
Most of the selectors are no good. Either from the gunk causing internal issues and or the cleaning itself. They suck air and the ski runs poorly. $20 for a replacement.