Repair Sendure HX raw water outlet

[Paul Greenhalgh]

Taking raw water hoses off my Sendure HX, I’ve found the raw water outlet pipe (aft end, up against exhaust riser) to be corroded through at its edge. I’ll take it to a radiator or machine shop for repair…but I’d like to be able to tell them what metal the outlet pipe is made. Any tips for getting this repair done right?
(6BTA 5.9 370)

Topic

[Tony Athens]

Looks like a decent repair to me…………..For the future in case you redo it again.. When you have a lot of surface area for what ever you are attaching or repairing lLike those bronze saddles) , then 95-5 soft solder will last to forever.. With very small contact area ( like installed a fish-mouthed bronze barb to the HX, then silver solder or using sil-bronze rod with a TIG works best…. But of course, much will depend of the talent doing the repair.

Tony

[Tony Athens]

Looks like a decent repair to me…………..For the future in case you redo it again.. When you have a lot of surface area for what ever you are attaching or repairing lLike those bronze saddles) , then 95-5 soft solder will last to forever.. With very small contact area ( like installed a fish-mouthed bronze barb to the HX, then silver solder or using sil-bronze rod with a TIG works best…. But of course, much will depend of the talent doing the repair.

Tony

[Tony Athens]

Looks like a decent repair to me…………..For the future in case you redo it again.. When you have a lot of surface area for what ever you are attaching or repairing lLike those bronze saddles) , then 95-5 soft solder will last to forever.. With very small contact area ( like installed a fish-mouthed bronze barb to the HX, then silver solder or using sil-bronze rod with a TIG works best…. But of course, much will depend of the talent doing the repair.

Tony

[Tony Athens]

Looks like a decent repair to me…………..For the future in case you redo it again.. When you have a lot of surface area for what ever you are attaching or repairing lLike those bronze saddles) , then 95-5 soft solder will last to forever.. With very small contact area ( like installed a fish-mouthed bronze barb to the HX, then silver solder or using sil-bronze rod with a TIG works best…. But of course, much will depend of the talent doing the repair.

Tony

[Tony Athens]

Looks like a decent repair to me…………..For the future in case you redo it again.. When you have a lot of surface area for what ever you are attaching or repairing lLike those bronze saddles) , then 95-5 soft solder will last to forever.. With very small contact area ( like installed a fish-mouthed bronze barb to the HX, then silver solder or using sil-bronze rod with a TIG works best…. But of course, much will depend of the talent doing the repair.

Tony

[Tony Athens]

Looks like a decent repair to me…………..For the future in case you redo it again.. When you have a lot of surface area for what ever you are attaching or repairing lLike those bronze saddles) , then 95-5 soft solder will last to forever.. With very small contact area ( like installed a fish-mouthed bronze barb to the HX, then silver solder or using sil-bronze rod with a TIG works best…. But of course, much will depend of the talent doing the repair.

Tony

[Tony Athens]

Looks like a decent repair to me…………..For the future in case you redo it again.. When you have a lot of surface area for what ever you are attaching or repairing lLike those bronze saddles) , then 95-5 soft solder will last to forever.. With very small contact area ( like installed a fish-mouthed bronze barb to the HX, then silver solder or using sil-bronze rod with a TIG works best…. But of course, much will depend of the talent doing the repair.

Tony

[donald roth]

I know this is old, but wanted to say that this is a great example of why it’s a good idea to run fresh water through the RW system after every use.

[Paul Greenhalgh]

I had to make about 15 phone calls to “specialist” welders and various radiator shops before I found one that was confident in its bronze brazing and silver solder techniques. Let me give a call out to Superior Radiators, South Granville (Sydney, Australia) for taking on this small but delicate job. They sleeved the damaged nozzle internally with copper, strengthening the nozzle end where the hose clamp will sit and preserving the raised hose barb. New end caps & gaskets from Brad and I’ll acid-wash and re-paint next week. My Sen-dure HX lives on!

[Paul Greenhalgh]

Tony: these are not decent pictures, but I’m not back at the boat to get any better. A couple show the corroded RW outlet elbow on the HX (Cummins part # 3866719); the third shows the riser set-up…but the HX is just off-screen to the left. You can see the black RW hose that connects to the wet elbow (the smaller red hose is the raw water return from NAIAD hydraulic stabilizers). If instead of the elbow I had a straight hose barb, it would eliminate the bottom bend and joiner pipe from the RW hose.

(Other work underway is the replacement of the 17 yr old wrapped dry riser & the elbow; and improving the support strut so that it better holds the new wet elbow).

[Tony Athens]

Post a decent picture of what you have now..

Tony

[Paul Greenhalgh]

Thanks Tony…I take it the “saddle” is the square-flanged hex nut on the HX, into which the bronze elbow is screwed in the photo you attached? A great idea & another example of Seaboard’s ‘better than new’ approach. In fact I want to replace the damaged elbow with a straight-up bronze hose barb, as that will reduce conflict with my dry riser.

I am totally ignorant when it comes to machine-shop stuff: I believe the Sendure HX shell is Cupro-Nickel. What is the best way to fix a bronze fitting to this: brazing, TIG welding, or ???? I want to make sure I take the HX and whatever fitting I end up with to a shop with the right tools.

thanks again

[Tony Athens]

There are two styles uses on the heat exchangers———-More or less pure copper ( like plumbing copper) and bronze (85-5-5-5), similar to the older varieties of Red Brass.. Obviously, we prefer bronze.
You can get “bronze saddles” which to me are the best as they are very adaptable

Tony.

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