Well, that's kinda what I did or something similar. A friend of mine who's great with boats (and also an auto mechanic) took a look at it and opened the back panel and drained the carbs, water came out. We then flushed them out with fresh fuel a few times and put all the pieces back together again. Fired it up, took a few times before it turned over, but once it did, that was it. The engine runs better than it ever did.