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My sportsman 500 EFI is bogging out and backfiring. Some history. We bought the ATV used, it had been sitting for about 8 months. We went for a rip and after about 4 hours tipped it in a big puddle (over my knees) it started bogging out and backfiring. We towed it home and changed the fuel lines, fuel filter, fuel and spark plug. Took it out for another rip yesterday and after getting through another big hole it started bogging out and backfiring again (about 1.5 hour of riding). Now it sits on my front lawn but everytime I start it is is bogging out and backfiring when I give it some throttle. Where should I go next. New to this!!!
 

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Did you check to see if the air filter was wet? Check the oil and see if it's milky.


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