I bought a everride warrior last fall with a 25 hp kawi and 54" deck. I only had 20 hours on it. Started mowing last night and after it warmed up, the engine stared "surging". At full throttle, RPM's will fall then go back up, fall and then go back up making it impossible to mow. If I throttle it down to idle it will die. It's still under warranty but I just got it back from another warranty repair with the pump belt. My main guess is that something is wrong with the carburator (needs cleaning, ect..). But with only 20 hours, I should not be having any of these problems. It's becoming very frustrating. Anyone have any ideas.