I had the carb rebuilt on my 33 horsepower ski-twin. It has two adjustments for high and low speeds on the front of it. It does not seem to run right to me, it has trouble when you try to increase the rpms. the guy that rebuilt the carb is trying to tell me that you have to adjust that out every time you run it by adjusting the air, gas mixtures on the front of the carb. It has the idle and high speed adjustments. Does this sound right. Any help will be appreciated.