Hey dont call me sir ! I get a wee bit nervous when that happens , it usually means Im in trouble . As u can imagine a needle is like a man part and the seat a girl part . Like a marriage made in heaven . Im not familiar with the engine u have but its probably similar to most engines . Just strip the carb down as far as you can but if the parts are no longer available buying a complete carb maybe your only option unless u have a spare carb from another brand that will fit . Also check that the needle hasnt moved back in its knurled holder ( thats the only way I can describe it at the moment ) so it doesnt completely close . If this is the cause of your problem u can gently tape it back or press it back into its correct position but not while its still attached to the engine or carb . Good luck