I just avoided a 950 $ repair bill by taking off my carbs and cleaning them myself. It took all day ,all internal parts were in perfect shape and i dident have to buy anything but a can of carb cleaner. The only clog was in the bottom carb the rest were spotless. The debris in the bottom carb looked like red minnow scales ,maby 20 individual scales- one of them stuck in my main jet stopping all flow and running on 3 cylinders. 950$ a day- what a job!! My boat runs PERFECT now.