Well, Hi, I have a Johnson outboard, 90hp. I think these next numbers are close to right. Year=1989 Model=J90TLCCA Serial=R7808967.<br /> Now the problem. It starts, idles and cruises great. But, when you need more speed it kinda stutters and vibrates (sorry, can't find a better description) then catches up and runs fine.<br /> Things that have been done???? Cleaned carbs, changed plugs and ran somthing through it to help clean.<br /> Any ideas on the cause and a solution? Thanks so very much. Sherrie
