Testing 1959 Mercury Mark 35A WITHOUT lower unit - how do I cool it?

[Boatsnhoes]

Hello,

I'm looking to do a test of my engine, however I do not have the lower unit, and therefore I do not have an impeller to pump water through the unit. I have a few questions related to this issue:

1) How do I get water through the engine to cool it? Can I just attach a rubber house directly to the water intake tube (the part that the impeller would normally feed)? Will that be adequate flow?
2) Where does the water on these motors leave from? I can't find any examples of a running version, so I don't know what to expect. I don't know if the water passages are blocked so I want to know where to look before hooking things up.

Thanks!

 

[Quicksilver]

Yes you can slide a tight fitting hose onto the water tube but don't use full pressure - the pump only puts out about 4psi. The tube fits into a seal at the top and it can fall out if the hose is pulling it down, that's why you don't use hi pressure it might blow the tube out. The water should exit thru the exhaust and the tell tale hole on the port side of the engine below the lower handle rail.

 

[Boatsnhoes]

Thanks for the advice.

As for the tell-tale hole, I can't seem to find it. Any chance you have pictures? I see a few holes in the area you described that go clear through into the housing for the motor, but none that look like they go into the engine itself to clear out the heated water.

 

[racerone]

Some water will spit out that exhaust relief hole.-----Most cooling water will exit with the exhaust out of the snout at the rear of the propeller.

 

[Boatsnhoes]

Here's a picture of mine. The hole that I suspect is the tell tale looks like it was painted over. Is that what's happening here? Is there a reason someone would do that?

 

[Boatsnhoes]

Found it right where you said. It was completely packed with dirt and a bit smaller than expected.

Thanks for the help