I installed a new carburetor on my U 42t and it ran fine for several weeks but now it is pouring gas out of the carburetor throat and the 2 secondary Jet vents and the oblong slot hole above the Venturi. I know or guess that it’s a stuck float and needle but checking if it could be anything else. The truck runs fine for a minute or so and then starts pouring gas even at a high rpm and then dies. If I disconnect the gas line it starts and runs until out of gas. I have done everything but remove the carb. Please give advice on your experiences.