If you have water in the fuel tank you can drain the fuel out of the tank. You do not have to take the carb off to get the water out of it. Get some seafoam fill the fuel filter with it, start and run the engine it will pull the water out of the carb. I have done this many times and never had to pull the carb. You may have to spray come gum out carb cleaner in the carb to get it to run and pull the water out of the carb.