Author Topic: P323 clogged engine water intake  (Read 1494 times)

Alma

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P323 clogged engine water intake
« on: July 06, 2017, 06:28:59 PM »
Over the twenty years I've owned ALMA I've had 4 clogs of the raw water intake on the keel.
One this weekend with six aboard...

Sometimes I move a purposely longer inlet hose to the sea water sink pump through hull. Effective but certainly not elegant.

Today hot tubs need two drains. That prevents the pump from sucking in a hand. The pumps have a "choice".

I've been kicking around the idea of boring a hole opposite the existing raw water inlet and adding another and its seacock and a tee so no bag, jelly or jetsom can get me again.

Ever heard of such a thing?



Crazy?
« Last Edit: December 09, 2019, 10:48:49 AM by admin »
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Alma

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Re: clogged engine water intake
« Reply #1 on: July 11, 2017, 09:55:43 PM »
Did you ever read Dan Spurrs book?
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T_schlueter

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Re: clogged engine water intake
« Reply #2 on: December 02, 2019, 07:46:48 PM »
You've answered a question of mine. I've been wondering about the purpose of an unused thru-hull near the raw water thru-hull. You use it for the galley foot pump. My hull(58) plumbs that footpump to pull from water tanks. My ice box drains to the sump box so that's covered. I like the idea of having that thru-hull available as a raw water backup.
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Alma

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Re: clogged engine water intake
« Reply #3 on: December 02, 2019, 10:59:09 PM »
You are correct the foot pump works from the fresh water tanks- The salt water at the galley sink is another counter mounted sea-water pump.
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T_schlueter

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Re: clogged engine water intake
« Reply #4 on: December 04, 2019, 10:07:23 AM »
Well, that's interesting! I have a unused hose connected to that thru-hull and a vacant hole near the sink. Apparently a p.o. removed the salt water hand pump.
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Valor

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Re: clogged engine water intake
« Reply #5 on: December 09, 2019, 08:45:13 AM »
Hi,

If you have a scoop style  or a one piece strainer/thru- hull please get rid of it and install an unprotected thru-hull. Then purchase and install a Groco opening strainer cover and install it over the thru-hull so you can open the strainer cover and service the thru-hull.

https://marinehowto.com/external-strainers-omg/. The version I went with was the second to last one in the article.  I installed a 3/4 bronze thru-hull with a Groco opening strainer made for a 1 1/4  thru-hull.  It will take a much bigger blockage before becoming completely blocked.

I did this last year just to improve reliability. The guy who dives on my boat always pulls the pin and cleans the intake. It works very well.

Michael M

1978 Pearson 323 Hull #108.
Yanmar 3GM30F