"Tim" wrote in message
...
On Apr 5, 11:07 am, Jim Rojas wrote:
Jim wrote:

"Jim Rojas" wrote in message
news:lTMJj.615$4Q1.344@trnddc06...
I have this old fresh water cooled 170HP Mercruiser inboard, that runs
great.

I replaced the impeller, and still no water circulates into the heat
exchanger. I looked for clogs, with no luck. I removed the old stator
charging circuit, which I had replaced with a standard alternator this
past summer.

So my question is can I install a radiator with an electric fan to
eliminate the salt water altogether? If so, any tips?

Thank you

Jim Rojas

To your question the answer is no.
Does water pump to the heat exchanger? You need to undo a hose to know.

Yes, I have done that. I took it apart and ran water through the heat
exchanger. The engine stays cool. I also ran water downwards to the
intake, and it flows. If I use the muffs and try to pump water up, there
is no continuous flow at all.

Jim Rojas- Hide quoted text -

- Show quoted text -
The muffs must fit tightly and there has to be sufficient water pressure.
You may have put the pump together wrong. Pieces from a disintegrated
impeller might be blocking or stopping flow. The copper tube in the upper
unit might have fallen out. The plastic piece that holds that tube might
have melted due to an overheat. The rubber hose that connects the bell
housing to transom plate may have ruptured. the fitting that connects the
intake hose to the aforementioned hose might have rotted out. Finally make
sure the prop spins when you put it in gear. If it doesn't the driveshaft is
probably broken.
Good luck man