We purchased houseboat with aq131a and 275 leg .this is 3rd time I had this issue I beach boat for few days then before we leave I check engine oil and I can see that engine is full of water. To top of dipstick tube .. I pumped it out took plugs out and when I cranked over there was some water that was in 3rd cylinder. How is water filling up engine? Though the exhaust to the cylinder then past rings? I'm stumped . There is a bellow with a baffle between leg and a hull is it leaking by it as its not sealing fully? Previous owner said that as long I dont beach the boat but let it float this shouldn't happen but that doesn't seam right. Water should not flow back to the engine that easy. Any ideas?