why does my boat die? i've got a 2001 merc 200 outboard, carb. Several times last summer I could be driving and it die. Once after I'd parked at a sandbar for a while. I was crossing back across the river about 25 mph and it just died. Started right back up, ran fine. 2nd time I was going about 50 mph wide open, died, started right back up. 3rd time I was going about 15 and it died. What's up!!! I am beginning to not trust anything about this Mercury 200hp. Could it be water in the fuel, does it have a water seperator that needs to be changed?