I am working a a Tillotson M-15A carburetor for a very early standard twin. It has a Serial number 34C2. I have good reason to believe that it is the second production Standard Twin to come out of the factory. I want to keep the tractor as original as possible. I have the Tillotson M-15A carburetor all apart and it is not looking good. I do not know if I can salvage it. The problem is I do not know where to find parts. I went on Tillotson's website and I can only find parts and manuals for side draft carburetors and carburetors for 2-cycle engines not the early updraft carburetors. I am thinking about just buying a working Tillotson M-15A carburetor because I don't even know if I can save the one I have. I am having problems just finding parts for one let alone a whole carburetor.