i have a 2000 sea ray 180 with a 3.0 mercruiser i/o this is my 2nd season with this boat. on first trip out this season engine would start and idle fine ...but upon trying to increase throttle motor stalls ...unless i can increase speed to over 2500 rpms quickly then again it runs fine. as soon as i throttle back to 2000 rpms the motor quickly stalls. engine restarts fine and idles fine in gear. had no problems last seaon beside a few dieseling events which going to middle grade fuel seemed to cure. i put in gas store at last seasons end .after talking to several mechanics the cures seem to be all over the place. iv'e owned boats all my life and i know to not just start replacing items without having a reasonable plan i think it seems to be fuel or fuel system related any help would be greatly appreciated Tim