I have an 83 Sea Ray with 228hp Mercruiser. It shifts to forward and reverse nice and smooth. It idles at normal RPM. When I put throttle control all the way, it's only moving throttle arm on carb about half way to WOT. I tried to adjust where the threaded rod of throttle cable attaches but if I adjust anymore, it moves controls at carb and idles fast. I recently purchased boat and cables are newer. Any help on adjustment of this? I guess it's possible that the new cable wasn't the right length but it shifts great and smooth. All the cables and shift/throttle control assembly are newer.