So 3 days ago I was mowing my grass an my mower ran out of gas. I pushed it to the driveway and called it a night. The next day I went out an put had in it and now it won't start. The motor does like 3 cranks and then seizes. There's a hole in the engine cover over the carb and it rained that night so I'm thinking water probably got into the carburetor. Does anybody have any ideas?