I was doing some maintenance today, and noticed there was still some movement available on the carb to WOT. I looked at the diagrams, and took the air cleaner base off so i could get a better view, and sure enough, the spring in the carb is stronger than the extension spring meaning the tractor will never go to wide open when at full throttle. is this the way it should be? I'm used to working on cars, and these tractors are new to me. Should it not be run wide open?