I have a 350 volvo penta with Barr risers. After winterizing, water was found in the engine. I drained all water and oil and the engine runs fine. I ran the around the harbor and in the driveway in order to find which riser was leaking. The motor took on no water and cylinders were fine. I took the boat out this past sunday and came home with an extra probably 3 quarts of water in the engine. Both banks of cylinders had water in each. My question is, what the chance that I sucked water back up the exhaust? I checked the oil midway throught the trip and had not taken any water on. A couple of times I shut down the motor at high rpm as not suck up a bunch of kelp. I have talked with a couple a couple mechanics and they said it is possible that I had sucked up the water. Do any you have experience with this?