Hello, all. New user who just posted for the first time in the meet and greet section of the site, hoping I can get some ideas on a problem. I have an intermittent overflow issue with my carburetor. My first thought was that the float might be stuck, however, prior to tearing into the carb I thought I would check on some of the other reasons listed in the shop manual for overflow. I see that the continuous venting system being clogged is one of the listed reasons. I have checked that line and can't find where it is pinched or cut, however it is cracked quite badly in places. I unclipped the vapor valve from its bracket and pulled the line to the other side. I then disconnected it from the tank and being careful not to pinch or crimp it I blew into the end that attaches to the tank. I would think if the line and valve are both good you could feel air coming out the end that vents to atmosphere, but could feel no discernible air issuing from it. I might could retry the experiment placing the outlet end into a cup of water to see if I can blow bubbles. I also have an intermittent fuel flow problem that might be due to vapor lock in the system, so if this is the culprit it may cure several issues in one swoop. Am I thinking this through correctly, or am I missing something? Do the vapor valves ever go bad or are they so simple as to be idiot proof? I would think the cracked tubing should be replaced regardless, correct? Thanks!