Name:   Pontoonfisher - Subject:   Cat, I may have figured it out. Date:   8/24/2014 9:15:46 PM

On all three of my carbs there is an open set of female threads right next to the idle screw. This is detailed in the blow ups of the carbs as a jet vent. If all of these are missing then the motor is running a richer mixture.  So putting these back in should lean out the mixture and possibly solve my problem. I guess it's possible all these vibrated out.