I just bought my '04 about 5 months ago, but I have yet to have any sputtering problems with it. My old Griz would sputter in extreme heat on slow rock crawls, but it never had a problem with water(except for the occasional transmission flood[img]i/expressions/face-icon-small-blush.gif[/img]). It was heat that my engine disliked, and water that my transmission disliked. I think Yamaha finally fixed the problem in '04.

 

I purchased a 2004 Grizzly a couple of months ago. I have been in deep water and mud two or three times. Each time, I have experienced spitting and sputtering. It was actually pretty embarrassing. The motor wouldn't pull a greasy string out of a cat's hind end. The water actually wasn't all that rediculously deep, and It never took a drop of water into the air box. Really not sure what is going on. It clears up immediately after coming out of the water though. Anyone have any suggestions.

Don
2004 Camo Grizzly 660
2003 PW 50
2004 Raptor 50