Hello again,
I accidentally found my fuel problem on a Craftsman high wheel trimmer. I was about to throw on a new carburetor when I noticed that...when I disconnected the fuel line, NO GAS came out of it! I hadn't noticed this the first time I removed and cleaned the carburetor because I pinched off the fuel line prior to disconnecting it. To my surprise, when I started to unscrew the fuel cap, the fuel started flowing! I knew it has a full tank! So, my question is this...how do these caps vent the fuel? I did push the little aluminum inner cap up and down but still it wouldn't allow fuel to flow until I unscrewed the cap a little. I found another cap on my junk lawnmowers and it worked just fine. I just can't figure out how one fixes this issue with the original cap!?