Troy bilt tb320bv 31cc gas blower starts and runs if it is flat on the ground but as soon as it is picked up it quits. have pulled the carb off and cleaned it. any ideas?

Inside the fuel tank you will see a flexible fuel line with a filter attached to the end ... that filter acts as a weight to position the fuel line in the lowest part of the tank no matter what postion the blower is in ... make sure the fuel line isnt broken .. also make sure the filter is still attached .. you can replace the fuel line and filter but both have to be able to handle achohol (in the gas) .. most of the older fuel lines cant and they go bad in a short time .. its actually hard to find the correct fuel line ... the size is not usually a problem but the material its made of has to say its suitable for modern gas .. most i found at local shops are the old type and wont work ..