I think I found one of the problems with the gas system.
The tube that goes into the tank has a clog,(you cannot blow either way) I tried to get it out but failed to do so. Is there any chemicals to get the clog out? I could not find the cylindrical think you were talking about, is it in the pictures?
This type of carb does not have a bowl and float. Let's refer to this photo:
The tube that sticks out to the left goes down into the gas tank. I has a screen-type filter on the bottom -- make sure that's not clogged. Also, try unclogging this tube when you've removed the main jet adjustment (see below.)
There's a screw with a spring and a hex nut on top (from this photo's perspective) -- that, I'm pretty sure, is the main jet. Remove the screw with the spring then remove the hex nut. Look inside -- is there another screw that can be removed? If so take it out too. Clean all that stuff and put it back together. When you reinstall the screw with the spring turn it gently until it won't go farther then turn it back one turn (this is the mixture adjustment you'll play with when you get it running and warmed up.)
You can get carb cleaner at auto parts stores -- Wal-Mart probably has it too. If you could blow compressed air through that clogged tube you might clear it -- I think that clogging is a major part of the problem.