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One of None
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Oh... You "may" have destroyed it for naught.

They come apart and can be re-tubed. Sometimes a tube is solder plugged

It's a very old technology also found in horizontal tube boilers called Marine boilers.

There are the exchangers as big as your engine some are even as big as a boat

Edit: they, meaning others,

the proper term is "shell in tube heat exchanger" the tubes inside are called the bundle and they are usually removable + repairable with solder or brazing the bad tube,

But, the cost is to replace small H/X's I'd probably equal or higher than replacing them with new for the non DIYer.
 

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Discussion Starter #3
Oh... You destroyed it for naught.
They come apart.
Thanks, but *someone* bought me a new one, and any more time spent on the broken one is money wasted. The scrap metal will be recycled, of course.

In any case, I'm wondering what you mean by come apart, because this one is all welded shut!
 

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One of None
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I said many, not all, or yours.

Usually one end one end comes off, the bundle slides out, O-rings or gaskets seal the header ends.
Smaller ones like what is on your engine are brazed together it doesn't mean they can't be repaired it just means it's more difficult. It is pretty much a throw away design.
 

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One of None
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Actually the term is "shell AND tube heat exchanger".
The one on your air conditioner is called coaxial lol
Yeah it's pretty hard to get the shell inside a tube. Lol

Y'all might need some help with this one. Lol

 

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Learning the HARD way...
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That is the 2" x 16" bronze H/X Universal part number 303145. It is appropriate for the Universal M-12, M2-12, M-18, M-20 and M2-20. These were also used on the M25, but it is really too small for that application.

I have a 299049, which is the same H/X without the mounting straps. I pulled it off of an M25 when I upgraded it to a 3¼" H/X. This particular H/X has less than a year of use on it and is in excellent condition. You can have it for $50 (the bronze alone should be worth that) plus the cost of shipping if you want a spare. It's been sitting in my garage for over two years. Send me a PM if interested.
 

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Discussion Starter #8
That is the 2" x 16" bronze H/X Universal part number 303145. It is appropriate for the Universal M-12, M2-12, M-18, M-20 and M2-20. These were also used on the M25, but it is really too small for that application.

I have a 299049, which is the same H/X without the mounting straps. I pulled it off of an M25 when I upgraded it to a 3¼" H/X. This particular H/X has less than a year of use on it and is in excellent condition. You can have it for $50 (the bronze alone should be worth that) plus the cost of shipping if you want a spare. It's been sitting in my garage for over two years. Send me a PM if interested.
Thanks the meta-data!

I don't think I will need a spare any time soon, so I'll pass.
 

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I remember an old-timer describing banking the coals over, straping on a rescue plank over the asbestos suit with a fire hose running and going into the firebox like a pizza on a peel .Find the leaking tube/s and plug before the subs find you behind the convoy .Kinda makes you wonder if you have what it takes. On a brighter note, if the ends of your moderately sized Ht ex are removable ,not a trinket for the recycle bin, determine if it's tubes or ?? Offending tubes can be plugged with a cedar dowel and get you to a repair shop. I carried oxygen/acycet and a selection of bronze and silver solder /flux on board and frequently fixed stuff beyond my pay scale.
 

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At some point in time some/many of the Uni Westy factory HXs were deemed too small and a larger size was recom3nded.
I have a new original size as a spare and the larger working.
 

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One of None
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there are still allot of tugs and trawlers and maybe even some larger ships that use Keel coolers for their engines, of course they'd be much larger than the little ones you see on your little Refrigeration units
 

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Learning the HARD way...
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This makes me appreciate my Beta Marine engine - the heat exchanger tube stack simply slides out for cleaning.
As you should.

Realize that the Beta and the Universal/Westerbeake are both marinized Kubota tractor engines. Most of the bronze Universal engines are now over 30 years old (mine is 32) and are still going strong. These were the best solution available at that price at that time (early to mid-1980s). That's why Catalina, Ericson, O'day and other manufacturers used them in their boats.

If I were to re-power from my M25 tomorrow, I would look closely at the Beta 25.
 
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Thought I'd mention an idiocintxrisy of keel coolers over H EX . The water pump under the thermostat is not positive displacement and at a long slow idle may not be circulating enough down and around.. Temp alarm and an eye on gauges a good thing. That be good with air lock in a regular hx setup too. Last time I looked, most of the fishing boats had keel coolers.
 

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My Westerbeke has a Mitsubish block, I have not heard of a Westy with Kubota block.. yet.
Westerbeake merged with Universal resulting in Universal/Westerbeake.
With over 75 years experience with marine propulsion engines, it's easy to see why Universal marine diesel engines by Westerbeke have led the way in auxiliary marine propulsion. Exclusively designed for marine applications, our Universal boat engines represent a breakthrough in marine diesel engine compactness, quietness, and reliability. Used by the most prestigious auxiliary sailboat builders, thousands of Universal diesel engines have been installed in boats for pleasure, commercial and government use.
Here is a Westerbeake / Universal (or Universal / Westerbeake) that is a Kubota block;
https://westerbeke.com/category/M-25XPB/5399ADA2DAF73A26740BF67D#mainoverview

It is based on the Kubota D950
 

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Dirt Free
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Westerbeke marinized diesels from several manufacturers and has gone to great lengths to make small changes so that OE parts will not fit, they have also gone some length to hide what those engines are.
Good marketing - predatory parts pricing.

i.e. They use a standard Sherwood pump and modifiy the mounting base on the pump to fit their own mount .... totally unecessary but they get to charge $400 more than the Sherwood version. I went through this last week and modified the Westerbeke mount to fit the Sherwood version. It took quite an effort to find the right Sherwood pump since Westy changed the part number and omitted their base modification from the drawing in their parts manual ............... PRICKS !
 

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Westerbeake merged with Universal resulting in Universal/Westerbeake.


Here is a Westerbeake / Universal (or Universal / Westerbeake) that is a Kubota block;
https://westerbeke.com/category/M-25XPB/5399ADA2DAF73A26740BF67D#mainoverview

It is based on the Kubota D950
Sorry eherlihy, if it ain't red it ain't a Westy!:wink

Westerbeke marinized diesels from several manufacturers and has gone to great lengths to make small changes so that OE parts will not fit, they have also gone some length to hide what those engines are.
Good marketing - predatory parts pricing.

i.e. They use a standard Sherwood pump and modifiy the mounting base on the pump to fit their own mount .... totally unecessary but they get to charge $400 more than the Sherwood version. I went through this last week and modified the Westerbeke mount to fit the Sherwood version. It took quite an effort to find the right Sherwood pump since Westy changed the part number and omitted their base modification from the drawing in their parts manual ............... PRICKS !
+1 boatpoker, exactly right - and I have the Mitsu parts manual for my W30B3 just in case and it was a pain to find out which model it was. But I give them a lot of attention and have never had a problem with these engines, 10 years previous boat, 2K hours + 4 years current @ 900.... knock on wood.
 

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Hi,
I can't send you a PM because I haven't posted enough but if you still have the heat exchanger I'd take it. I'm in East Falmouth and I assume you can PM to me and I'll respond. Thanks!
 

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PM Sent - I will be in East Falmouth TOMORROW so I can deliver! :)
 
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