water take off from SMX 1730 pump

[Michael Starr]

Engine is 6BT 210.
I recently replaced the trans cooler with one that has the two zincs.
The cooler that came with the engine only had one small outlet that was used to supply the dripless shaft seal with cooling water. The new unit has openings for the two zincs. I wanted to keep the two zincs in the tube so I was looking for another location to get water to cool the shaft bearing. I found two plugs on either side of the SMX impeller cover. I used the one on the left near the intake port (when looking at the pump from the impeller cover side) . When I test ran the engine on the flush hose water flowed out the shaft as before. Water also flowed out with just hose pressure (engine not running).
Is the hole I used on the pressure side of the pump? I believe it is. Thanks.

Mike

Topic

[Michael Starr]

Tony\'s advice

I appreciate all the advice. I contacted Tony and he sent this article FYI.

Best Locations to get Water Flow for Shaft Packings

Mike

[Rob Schepis]

Philip wrote:

It means it does not interfere with contact.

Phil

Exactly right, thanks Phil. I guess my wording there wasn’t so good.

1 user thanked author for this post.

Russ

[Philip]

It means it does not interfere with contact.

Phil

1 user thanked author for this post.

Russ

[Russ]

Rob, sorry, I am confused? Are you saying that because the pipe thread sealant is displaced it shows it doesn’t get in the way? It sounds like you are saying the opposite by saying the pics make it clear to those who doubt that it does get in the way. If it is displaced and not on the threads except at the very top, and mostly “displaced” out of the thread area, doesn’t that mean it does not interfere with contact?

[Rob Schepis]

BTW, looking at my zinc cap pics with the displaced pipe thread sealant should be very clear to anyone who doubts that pipe dope gets in the way of the metal to metal contact of the threads to the cooler………..

[Michael Starr]

Ok got, Thanks Rob

[Rob Schepis]

I’d go with the water tap before the tube bundle and the zinc after the tube bundle. Here’s 2 zincs from my gear cooler, you can see which one was in the full flow of the seawater that was coming into the cooler and which was hiding behind the dispersed flow of the tube bundle.

[Michael Starr]

Thank you Rob.
There is a short plastic tube inside the hose that reduces the flow near the dripless. Which end of the cooler would you recommend the zinc be at? The end that the seawater enters the tube or the exit end?

[Rob Schepis]

No, suction would be for something like running antifreeze through for winter layup. You want pressure. Be careful, might be too much pressure for your dripless setup and will require a restricting orifice or such.

If your new gear cooler has two zincs why not repurpose one for the dripless water supply, you’ll still have one zinc protecting the cooler. That’s what I would do.

[Michael Starr]

Thanks for the replies.

So I need to use the port in the picture marked suction?

Thanks

Mike

[Rob Schepis]

Pump Ports

Here’s a visual.

[Philip]

You need to fitting on the side of the pump that goes to the cooler not towards the boat. If water runs out fitting with just the hose your on the wrong side.

Phil

[Author]

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