ATV won't start

[FOURG63]

Hey, I have been searching for help on a quad I was asked to look at by my neighbor. The quad is a little Raptor 80 that the guy has for his grand son. He said the kid rode it through a deep mud puddle then shut it off when he got to the other side. Now the quad wont start. I have changed out the fluids and the spark plug but it didn't help. Is there anything you guys can think of that might be wrong? Low compression was caused after this incident maybe? Any help would be appreciated. Thanks

[Baileygunns]

Fush the carb and fuel lines, check the fuses. Clean the carb, he may have pulled some dirt into it that settled after it was turned off.