My Crusiers with twin 351 engines had a exhaust hose fail on the starboard engine .The interior of the hose had collapsed I heard the hose pop and shut the engine down . The water temp was normal when it happened. Putted back to marina on the port engine. Prior to replacing the hose I checked the oil level and it was normal.Replaced the hose and attempted to start the engine but had trouble getting it to turn over. Had to jump the batteries together to get it started. The engine ran fine and idled normal. I shut it down and rechecked the oil level and found water in the oil. I plan on draining the oil and changing the filter next week. Any ideas on what to do if I find water again? Again the engine water temp was normal when the hose popped .