I have a Mercruiser Inboard/Outboard 3.0L Alpha One attached to a 2004 Bayliner 175. It has been running poor ever since I pulled it out for the summer and had it summerized. I just had my mechanic clean my carburetor, change my spark plugs and inspect my fuel delivery system. But now it has poor speed/acceleration it idles ok a bit ruff at the beginning and then once I get it going I put my throttle all the way forward and it only does about 10 mph or less. Any help would be great thanks.