I bought a used 1989 50 h.p. Mariner, Got in the water barrel today everything runs great except no water pumping out the tell-tale. opened up the waterpump housing and all there was, was a rubber ring that used to be the impeller??? Where and what happened to the pieces and what do I have to look for if this is a problem? Im working on this thing right now please help....<br /><br />Thanks,<br />Suzuki40