Launched the boat on Saturday. Out board seemed sluggish. Finally made it out to a place on lake to where we could sail for a bit. Worried the entire time we could not get back into harbor. Fired up the 1984 mercury 7.5 and same thing, very sluggish. Made it to slip, pulled the cover on outboard and there it was, a shop rag jammed into the carb that the mechanic had put there for transport of the engine after service last fall. Pulled it out, engine revved up and ran like a top. Looking back to last fall, he told me don't forget this rag.......man I'm getting old