I have read that the shutter valve can be replaced but the question is, is mine bad and if it is can it leak fuel into the carb. or cause it to burn rich and fowl out plugs. Not all the plugs but just one. It doesn't have any of the symptoms I've read about. No rough idle no honking or whistling noises. As far as I can tell it doesn't make any noise that I can hear.
Curtis
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