I just bought this engine used and it seems to be in great shape compression is 130+. It seems to idle a little rough but not very bad, mid speed is great. The only problem I encounter is running full throttle it seems to sputter a bit. If I back off to a little more than 3/4 its fine its just full throttle that when this happens. I removed the VRO tank and unhooked the harness for the buzzer not to go off. However I cant seem to find the cause of this minor sputter at full throttle. One note is that if I use the trim up or down while full throttled the engine seems to speed up until I stop using the trim engine. Does this sound like a ground issue??? 
