Splashed the boat yesterday after getting a bottom paint job. Out of water for 7 days. Port engine would not start. (cat 3126) It finally started on about the 4th try, idled rough. After observing no water coming out of exhaust, I shut it down. Then tried to start again and it just cranked. Finally after an hour of priming it started. Still no water. Have water at least to the strainer which is clean. Boat ran fine when pulled from the water. Has always started immediately. Any clue to what is going on?