I have a 1984 Honda 200es that I use almost exclusively for ice fishing (only other use is to haul deer out of the woods). The machine has never been submerged, but whenever I go through an inch or 2 of water that's sitting on the ice, I am getting water in my oil (it's milky). I have never taken it in water deep enough to touch the wheel rims either. Any thoughts on where the water could be getting into the engine?