Am a long time Argo fan [1979] and am having problems with a 2003 Briggs and Stratton 17.5 Vanguard with 106 hr on it. It starts, runs, pulls, idles, etc, great but travelling at about one quarter to one third throttle not under load the governor gives a quick blip or bounce every once in awhile. I have cleaned carb and remover the "limiter' to get a good idle and acceleration. It seems the "bouncing" is less with the idle screw enriched. I have the manual for the motor and it has a complicated process using a tach [which I don't have] to set the carb and governor which are inter dependent on one another I guess. I've set the governor per manual with no change. Also installed an electric fuel pump. Am wondering if anyone has any thoughts before I buy a tach to set the governed idle etc. Am really curious to hear other peoples thoughts. This is a great site.