I just bought a 1979 50hp mercury outboard. The engine worked fine when I fired it up but there isn't any water coming out of the engine. I think they call it the "telltale". I ran the engine for about 2 to 3 minutes and it shut off. The engine was hot. What should I do? Where is the telltale located on this engine? How do I replace or repair the pump? If there is anyone out there that can assist me, please respond. I NEED HELP!!!!