Changed Thermostat and Impeller, but...

[kennygeorge]

I guess I should have done one at a time and tested, but I wanted to get a "new-to-me" 1973 65hp 3-cylinder Johnson ready for the lake. I changed the starter motor, solenoid, impeller and thermostat. The old thermostat was frozen open with a small opening, so I knew I was on the right track.
I have now run it in a barrel of water, that never got hot, for 15 minutes. No water ever came out of the pee holes.
I'm puzzled as to what is wrong:

1. Did I install the impeller wrong?
2. Is the thermostat bad?
3. Did I not run it long enough? (but I don't want to warp the heads with heat)

After cutting it off, I did see water coming out of the small hole just above the waterline on the front of the shaft housing... Maybe an anti-freeze hole to let all the water out.
I've attached pictures of the old thermostat showing the opening, the installation of the new thermostat and the impeller installation. I used hose clamps to get the impeller small enough to go into the housing and had the blades go the same direction as my engine manual. I did make sure the woodruff key was installed correctly and the impeller was spinning when I turned the shaft by hand.

 

[F_R]

It must be working if you ran it for 15 minutes without burning it up. There is no "pee" holes on that motor. Just the exhaust relief holes in the back that water should mist out. I suggest you get it out of that barrel and onto a boat on the lake where it was designed to run, and see if it is cooling or not. And please don't run it 15 minutes if it isn't

 

[Sea Rider]

Did you installed just the impeller or the complete water pump kit ? Pic 1 shows a shot liner that will surely not pump right or will screw the new impeller very fast...

Happy Boating​

 

[Faztbullet]

SEA....That's a all aluminum housing with no liner....many in worse shape out there still pumping just fine.

 

[racerone]

Looks like you need to replace / refinish pump housing.----Water does NOT stream out those 2 holes at idle.----It just mists out of them.

 

[RBoyd1971]

A good bit of water will come out of those holes when running fast and up on plane. Goes from a mist to a steady stream. Doesn't shoot out, just flows or blubbers out. I've had a couple of those motors.