I was riding my Brute 750 through some water about a foot deep and at speed, dipping into the water at the edge of a river bank about a week ago (clean fresh, not salt). I never sucked any water in the intake, nor did it stumble at all while running.
Later on after sitting for a while I fired it up to head home and it wasn't running very well, alot like it was running on only one cylinder intermittantly until you gave it enough gas and increased the RPMs a little and then it would over come the stumble.
I figured it got a little water in some place and would dry up eventually. I went out to the garage a couple of days later and fired it up (yes it's stored inside and I live someplace that has not frozen yet). It did the same thing when I fired it up and ran that way until I rode it for about 15 minutes around the block. Then all of a sudden it stopped running like that and ran nice and smooth. I figured the water had evaporated out and all was well.
No so lucky. The next day it did it again, and again today.
My thought is there might be water in one of the coils. I have removed them both and have them hanging with the weep hole pointed up in the oven on the warm setting which should dry them out. I also drained the carb bowls thinking they might have gotten a bit of water in there although my air box was dry.
If that doesn't work, does anyone have any other thoughts or experiences that might help? It's behaving just like when you get water in your distributor on a car, but there isn't really a distributor on this.....
It didn't work....so I've been experimenting with the carb heat system connections at the carb. Thought is that one of them might not be coming on or possibly is coming on when it shouldn't.
I also tried nw plugs (gapped correctly) and I always put a little grease in the boots.
Any help would be great...

 

My buddy has his brute in a mud hole, and he had trouble with it. From what I hear Brutes are not too good in water. Anyhow my buddy had to change all the fluids, the spark plugs and wires. He also had to have the carb cleaned, alond with puting a new air filter in it.