I bought this kit with low expectations as far as being able to rebuild the heavily oxidized carburetor I had. However, after rebuilding the carb per the instructions in the Tecumseh L-head Engine service manual that is available on the Web, I put the carb back together, set the main jet and idle screws as instructed, and put it back on the engine and reconnected the carburetor linkage and the choke cable. It started on the first pull and has run perfectly ever since. The parts in this kit are very good quality. Definitely recommend you try them.