Reply To: 1980 ish Mercury 7.5 hp Tell-Tale?

[Buccaneer]

No thermostat found. I removed the tell-tale hose and it was clear,
unscrewed the elbow on the head, and all clear there too.
Blew some compressed air in the tell-tale hole, and bubbles
blew in the water.
Started it back up, put it in gear, and wound it up some, and
it pumps a weak stream of water…… guessing the water pump
impeller has seen better days.

Prepare to be boarded!