Here goes trying explain what my ski is doing. Idiles fine, topend is fine. When you go wide open on throttle seems like it goes half throttle for several seconds. Then the motor cranks open and your running wide open with no problems. I own a 98GS I set the carbs at 1 1/4 turns out and about 1/8 turns out. I replaced the diaphragm assy. and the gaskets on the pump side . Any help would GREAT getting closer to trying figure out the carb set up. tks