I have a 24" Lowes Pontoon. Last week we were helping a neighbor pull his dock around. When we parked my boat it wasnt taking on any water. We had found we sheared the prop. I was out with out my husband and tried to throttle it(of course after new prop went on). I got up to about 3000 rpm and noticed water coming in in front of my seats. Under the seats were dry. I slowly lost rmps. ANY IDEAS?