Starts to light but goes right out

Vaporized propane sounds just like air coming through a hose. Turkey fryers use a different regulator than a standard barbecue which uses a low pressure -- 11" water column displacement. Pressure for a BBQ is measured in displacement because LP pressure is very low, less than half one pound PSI. Turkey fryers use a higher pressure so more gas is able to feed to the burner but the regulator diaphragm adjusts because of the adjustment wheel. However, before determining the regulator needs to be replaced, adjust the air shutter on the venturi and ensure the orifice is clear. LP must be mixed with air in the burner in order to burn but if the shutter is open too much we can hear air-flow and too much air can definitely cause that sound and cause flames to blow out. We have a video at you---e showing the adjustment with too much air blowing-out the flames. First check your connections and orifice to make sure there are no leaks or impediments. Second restart the burner with the air shutter almost closed and continue making adjustments -- while burning if possible. If neither of those work replace the pressure regulator. Most people will initially say replace the regulator but they do not go bad as often as many think; a regulator is only a open space that limits him much gas can travel through at any time.