my buddy sank his Brute in a mud hole, the front left went in the deepest, the pipe and rear of the quad were out of it. About 5 minutes after we pulled him out the Brute began to backfire and miss real bad, eventually it died and wouldn't start. He took it in to the dealer and they said it had mud in the motor. $2100 to fix it. Where do you think the mud entered? His air box was dry and it definitly didnt come in the tailpipe. Crankcase vent maybe?

 

If it didn't go in the airbox or the exhaust my only guess would be that the front head pipe wasn't tight on the front head and water leaked through. Either that or something leaked through something that was loose on the intake. The dealer should be able to tell you if he's working on it.

 

It would have to be a factory defect of some kind...i sank my brute up to the handle bars last night...i took a dive off the back of it and she cut off and was sunk to the bottom with jus the bars and front rack showing...luckily it didnt get into the air box but definitely fed up the exhaust...we winched her out with my buddy's grizz then stood her up on her tail to let the water run out and she fired back up after about a minute of cranking...belts were slipping due to the water and she was missing for a bit but she cleared up and seems to be running fine...for your friends to have blown up from that little bit while mine was totally sunk something must have been defective...just my .02

 

thats what I was wondering because he has sank this thing WAY deeper than that and nothing happened. however, Kawi said "mud in the engine, no warranty"