So my Exmark metro with the Kawasaki motor has just started to not sound 100% right. Basing it off of other equipment I own that has done the same thing, Im thinking the carb might have just started to get blocked. When the enigine is just idling on low you can hear that infamous up and down revving sound. Although not real bad it just doesn't have that nice steady hum. I poured a good amount of seafoam in the tank. Im using the machine later today to see if that helps. My guess is that it will not so what next? Would taking the bowl off the bottom of the carb help or is that a waste of time? Do I need to take the entire carb off and soak it in cleaner over night? If so, do I need to order new gaskets or anything? I've never worked on this mower before so any help would be appreciated. At the begining of the season I started using that Star Tron enzyme fuel treatment. Maybe it was too late and I didn't notice the rpm's going up and down very slightly? Is that stuff just a gimmick or because I wasn't using it from when the mower was new I was just a little late to the party?