hello i have 1990 200 gt and was ideling arund trolling the alarm went off i shut it down and when ya turn the key on it would still be on for about 1 min i ran it for two hrs after that it never went off again so i started trolling and it went off again it only takes 4 or 5 mins when trolling for the alarm to go off what does this mean it had water comming out the peahole is it just low water psi at idel thanks