Hi, my two-year old son poured some water in our lawnmower gas tank.
I’m not sure how much water, but before my wife told me what happened, I had started the lawnmower and it ran for about five seconds, then it sputtered out. Each time I started it it would do the same thing.
You might also take the bowl off the bottom of the carburator. Just watch out you don’t let any little pins in the mechanism in there slide out of place. And, you could try running through it some alcohol, “dry gas” I think is the name for it, which is miscible with gasoline and also with water.