Dry running of engine

[DeanBrantley]

When flushing or just running engines out of water we are limited to just a minute or two because of carbon rings not cooling, ect. My question is if your pumps and drive shafts are removed I cant think of any reason we couldn't run them pretty much indefinitely, right? I mean as long as one is flushing the motors. Is there a flaw in my thinking?

 

[Coastiejoe]

When on a hose, you are attached to the FLUSHING" fitting. The water runs in reverse of the normal routing. It will certainly cool to a degree, just not as efficient as if you were sitting in water.

 

[DeanBrantley]

So right, I see now after looking at the water flow thru the head and cylinders which brings me to this. Why didn't the factory just tap the flush into the pump line, a simple t fitting would shut the flush operation from going out the pump pick up to make sure water was flowing thru the head? Unless the pump orifice actually regulates the amount and pressure of cooling water

 

[Coastiejoe]

Because we need to be able to FLUSH the engine. This dumps the sand and debris that he pump and impeller picks up when out cruising around.

 

[Coastiejoe]

Also, if you tapped in after the impeller but before the engine, the water would go to the path of least resistance. It would basically fall back and simply dump out the pump. You would have to pinch a hose or something in order for it actually get to the motor.

 

[DeanBrantley]

A simple directional fitting would make sure flow is whatever direction you want, and don't want the water to go. But now I understand why you want the reverse flow when flushing the motors after a day out. To do just that...Flush lodged crap out of the circuit that may be stuck, didn't think about that, thanks. Now, with no consideration of desalting, flushing ect. if we just hooked our water up to the pumps inlet hoses, no pumps, no drive shafts obviously no carbon rings, seems to me we could run the engines indefinitely out of the water. Me thinks???