Counterman at brg. Supply said most come from china unless n.o.s.
This true of most anything.
Briggs & Stratton sells a variety of repair parts for their small engines. Almost to a component, these are made in China to American standards. A replacement carburetor - made in China for my roto-tiller - costs about $90 when bought through B&S.
Meanwhile, out on Ebay, one can find a visually IDENTICAL carburetor being sold as replacement for B&S part number XXXX, and selling for $12.89 DELIVERED.
The difference between these two carburetors is primarily conformance to the design standard. Or - better - assurance that a design standard was upheld. I.e. both "quality."
This is the conundrum which China presents - one can buy top of the line Chinese goods made to whatever standard one desires, or one can buy something identical - but how does one REALLY know how identical?
By paying extra for the name-brand standard it is very likely one has nearly all the original design standard kept intact. I say likely, can one ever really know? It might be an easy substitute to say "lets make this shaft out of 1020 steel rather than the specified 1040."
Now go buy a Tecumseh carburetor - the original design standard does not exist, except for the traces left over from those who sub-contracted work for Tecumseh while they existed. So the jury is even further out of hearing of the judge on that one.
End of the carburetor story: Being frugal, I bought the $12.89 carburetor and had it delivered. Attempting to make it work on the roto-tiller, I was flummoxed by the inconsistency of the carburetor - one moment it would run rich and the next it would stall on lack of gas. Disassembling the new carburetor, I found one of the adjustment needles not in alignment with its metering orifice - instead it was bent off to the side providing no adjustment whatsoever. Re-assembling, I made the carburetor work the same as the original. I.e. the issue was an "assembly quality" issue.
I was pleased enough to buy a SECOND Chinese carburetor - to be kept as a spare in case I clobber the carburetor on a fencepost during a turn as I had before.
So one never knows. Quality from non-name-brand Chinese is certainly hit or miss. A bit less so from American branded Chinese product.
Joe K