Grizzly 350 Randomly shuts off

[Livingmylife93]

Everytime my dad goes down to Hatfield Mccoy his Grizzly will turn off 1 time for an odd reason then usually wont do it again for the rest of the trip.

it happens when he splashes through a puddle about 4 inches deep lol, but before and after that he will go through a bog 3 feet deep and it will be fine?

After it shuts off it is hard to start then it sputters and runs real rough for maybe 10 minutes of riding. The air filter was never wet though..

Whats the deal?

[Ranger]

Spark plug maybe? That or the ignition connectors are getting wet...