I am trying to revive this motor, with no history on it. I have rebuilt the carb , new battery wires, solenoid, gas lines. I have serviced the starter, it was gummed up, runs good now. Checked the compression , top 80, bottom 90, both held firm. Finally adjusted throttle and slow idle correctly to get it to start. Water pump replaced all new parts. Old one was scary, looks like the inner metal cup moved and restricted water flow, and melted the impeller. She sounds good, but I have only run it very short runs to try to figure out why I am not getting good water flow. At normal start up the telltail dribbles at best. Higher throttle I get good flow, but I have to say I am getting mixed results even then. Good one time, poor another. The telltail hose has been replaced and I have run heavy fish line ,and a small wire into head to clear out gunk. Both have come out clean , and I've blown into the hose and just hear bubbles down in the exhaust tube area. I am running it in a deep tub of water. It looks like the telltail comes out before the thermostat, so should I think the thermostat might be missing or stuck open? It's not building enough pressure to come out at low idle? I am at a loss, and kinda new to evinrudes, the last beast was a mercury.