Hello... I was on my boat earlier today, and the motor was running excellent. I ran out of gas in one tank, so I switched to the other one, after doing so the motor ran awful and the water alarm kept going on. The motor sounded like it was running on 2 cylinders out of 3 and when I would rev it in neutral, the problem would go away but only for a short time. What does this mean? The motor did not over heat.