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Old 28-12-2019, 06:33   #16
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Re: Raw water strainer - a near boat-sinker

A high water alarm is simplicity itself. Nothing but a spare 12v DC wire, a float switch, a $9.69 siren from Amazon, and back to ground. Guaranteed to wake up your slip neighbor if you are not there. Annoy him mightily, in fact. Try:

https://www.amazon.com/XINFLY-Outdoo...7539773&sr=8-9
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Old 28-12-2019, 12:17   #17
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Re: Raw water strainer - a near boat-sinker

Hi Mates, Does anyone know where I can buy the O-Rings of raw water strainer of mainship 34 trawler 2005 ? Are the O-rings are genetic? Thanks very much!
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Old 28-12-2019, 12:50   #18
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Re: Raw water strainer - a near boat-sinker

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Originally Posted by mainship 34 View Post
Hi Mates, Does anyone know where I can buy the O-Rings of raw water strainer of mainship 34 trawler 2005 ? Are the O-rings are genetic? Thanks very much!
Anywhere that sells orings
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Old 28-12-2019, 18:18   #19
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Re: Raw water strainer - a near boat-sinker

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Hi Mates, Does anyone know where I can buy the O-Rings of raw water strainer of mainship 34 trawler 2005 ? Are the O-rings are genetic? Thanks very much!
Hi Mates,

I just found out O_rings is OK but the lip of the container (cup) has broken. I want to buy a genetic seawater strainer, but I don't know what is the sea water volume required by Yanmar 240 Hp . In my local store, there are two types of strainer. One is 40LPM and the Other is 90 LPM. The 40 LPM is fitted to the space. Anyone has the idea? I look through the manual of Yanmar 4LHA and couldn't find the information.
Thank you!
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Old 29-12-2019, 10:25   #20
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Re: Raw water strainer - a near boat-sinker

when my cork gasket was too compressed to seal I cut a piece of EPDM roofing mat'l (from spares) to a circle to fit the cap - doesn't need to be a ring. Voila! Good 3 years now. Will be checking the hoses this spring & looking to see if I can raise the strainer above water line. Thank for the post!
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Old 13-01-2020, 09:51   #21
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Re: Raw water strainer - a near boat-sinker

Had the same experience but even worse with a boat purchased a year ago. The bronze raw water strainer broke as I tried (gently) to open it for inspection.

Closing all seacocks when away is the absolutely right practice even with my fully replaced 11 Trudesign seacocks, fittings and plumbing.

I removed all bronze raw water strainers (refrigerators, a/c) and replaced with over the waterline plastic strainers. Yes, I had to also replace the pumps to self priming, but this is a major safety concern. I do not trust strainers and pumps below the waterline.
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Old 13-01-2020, 10:16   #22
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Re: Raw water strainer - a near boat-sinker

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Originally Posted by stimpsonjcat View Post
C-clamps...you can never have enough.

Have had several instances where a c-clamp and two pieces of flat wood or metal got used to seal a busted hose.
Our GROCO strainer tie rods broke, same results. I just happened to be doing my periodic walk about while motor sailing. I found water spraying in alarming volume. I tied a tourniquet top to bottom and used a screwdriver to twist-tighten the line. This nearly sealed it. I now carry spare all-thread and clamps.
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Old 13-01-2020, 13:41   #23
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Re: Raw water strainer - a near boat-sinker

Another advantage of sea strainers above the waterline: When laying up for a while in the winter I remove the cover and run four gallons of "Salt Away" mix through the engine from a bucket and hose in the cockpit. Gravity feed will keep up with the flow needed by my Beta 14.
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Old 13-01-2020, 18:50   #24
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Re: Raw water strainer - a near boat-sinker

Thanks for sharing. A friend's Hinckley 52 had a similar failure, in that case I believe one of the "ears" broke. He had a couple of feet of water over the floor boards and a huge repair bill. I replaced my strainers with less fragile designs.
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