You can get a new carb from [ecedwards_tools]from ebay for around $12.00.I have a half dozen right now for engines from 45cc up to 62cc.what are the numbers on your carb.Also,does your carb have 2 fuel nipples and if it does is one closed off.Or if theres one closed off does it have a piece of tygon with a bolt or screw stuck in it.Check the crank seals and make sure theres no crack or little piece or anything missing as somtimes they tear when they go back together.If you put your finger over the intake of carb and turn engine over does it suck any fuel into the line or carb at all?When it does run do you see bubbles in the fuel line or does the fuel run completely out of the line,meaning the line goes dry.