Please post make, model, and year.<br /><br />Problem could be a bad water pump, or impeller, a broken water tube, or a clogged waterline going to the telltale.<br /><br />Were you running in a lake, water tank, or on muffs?
pumpit<br /><br />some times debris clog up the tell tail, you can clean it with a drill bit or take it out and blow compressed air through it add this thought to the other posts .good luck bret<br /><br /> If you need further assistance please email me @ forcepower01@yahoo.com. thanks,Bret