I have a John Deere Model 40 Tricycle. Does anyone know the inside diameter of the original fuel line that runs from the sediment trap to the carburetor? This was a hard metal line (like hard break line on a car). I made one up but I am beginning to think it is too small. When I adjust slow idle, all OK. When I adjust fast idle, all OK. When she"s in motion it sputters intermittently. I replaced the carb with a brand new Zenith. It runs good when not in motion. I have checked timing, loose wires, etc. I"d like to know the original fuel line size if anyone knows it regardless if this is the cause but would love any thought. Thanks in advance.