Hi, i have a 1990 225hp yamaha on a 1850 bullet ski boat, it seems to have no top end speed/REVS i have cleaned all carbs and checked floats and seems to be working fine, i have replaced plugs and fresh fuel/oil, changed jetts. i ran her in the weekend without the coweling on and the top right carb was spitting fuel back out the butterflies, in quite large qtys. im starting to think this maybe something to with the airflow needles etc.. can anyone please help?