Thanks. Makes sense in that context. MotorSheister used it to repair cases that had exit holes in them from thrown rods, etc. And sold them to people w no disclosure.

So in the photo I posted of the carburetor, (motorcycle carb, fwiw), what product or method of repair would you guys use? :cool:

You can do the epoxy and monitor it. If it starts to fail for some reason it's not that difficult to reverse the process and have it welded.

Covering plugs in the case.

I would be very comfortable with JB Weld. I just used it to seal the bottom of a lawnmower bowl. Zero issues.

Is a replacement expensive or un-obtainable?

devcon 10760.....what dan said.... i have heard peter dawe patch engine block holes with this stuff in a pinch. in my race gear box he fashioned a novel oil entryway for cooling and tap/died it for a high pressure AN fitting. the stuff is unbelievable.

I'm not sure what you want to do. Is there a part that fell off you want to reattach?

Do you just want to plug the hole? If so, what is the tube's function?

It's not an assembly that I am familiar with.

Yes and kind of yes. Used carbs that will work are available but mostly in awful condition or really expensive. Also, my carbs have an unusual and beautiful satin finish from the factory that the earlier ones don’t have. I haven’t found similar carbs or carb bodies in my type for any price.

The hole stays, in fact it would need to be re-drilled after welding or epoxy. The damage is the missing metal chunked off around the hole.

Can you shape a washer to curve around that tube and then drill to hole size spec? Wave washers are thin and might work, already curved though easy to flatten and recurve. Or McMaster Carr has a huge selection of shims that might work in filling and resizing that hole.

I think a washer would disrupt the airflow too much in that particular case. I would just JB and be done.

Yes, the damage pictured is on a concave surface that would need to be welded or epoxied and then milled down to original contour. A washer would not work.

That's too bad. I use .1mm (4 thousandths) on up McMC shims when putting Guard LSDs in 915s. Thought that kind of shim thickness might work and be a stronger more permanent repair than JB Weld alone.

Is there a brass tube that fits in the hole or is that the orifice for a metering needle? I ask because it would be good to understand what forces are given to that hole. Or, how in the world did that break like that?

It very much looks like a slide valve motorcycle carb.

Edit: Sorry, I just saw that you said it was a MC carb in post #42. So, it is the needle hole. Weird break.

They broke because some idiot installed the little atomizers in the holes incorrectly, (backwards), and the larger end pushed right through the soft aluminum when I...err...he tightened them down. :)

I’ll post pictures tomorrow of the offending parts and it will all make sense.

Denis that was really bad luck the previous owner :rolleyes: put a hole in it.

I think it's a very good candidate for JB Weld or one of these greater alternatives.