Hi There. I have a craftsman snowblower with a 9HP Tecumseh engine. The carb was giving me trouble last winter, hard staring and surging. After 15 years I figured I would replace the carb. Installed new carb yesterday and the bowl will not fill with fuel. If I take the bowl off fuel will pour down. Bowl on. No fuel fills the bowl. Float moves freely with the touch of a finger. Any thoughts before I buy another carb?