Launched the boat and idled out of the no wake zone, engine temp was up to 120, water pressure was between 5-10 psi, and tried to accelerate. At 1800 RPM's I got a single beep alarm, when back to idle and repeated the process, with the same results several times. The single alarm occurred at 1800 RPM's each time. Is the likely cause water in the fuel or something else?