It's big and has a pipe thread for mounting. Not sure what it fits. A friend asked if I knew and I said I did not but someone here may.
not brush. charley
If is really big it could be off of a prairie tractor. A 35-70 Minneapolis that was around here had a big five ball on it.
These were used on all manner of things large and small, hit & miss engines, boats, tractors etc, they are a very good carburetor. I just sent a real small one with a 3/4" pipe thread to MN, they were used on some 1910-11 M&M motorcycles, among other things. Brush carbs are real similar to T, I have seen them being hawked as T carbs over the years. Having worked on many a Brush, the differences are a threaded throttle arm (1/4-20) a shorter float bowl, and an adjusting knob without the 2 holes in it. Also, they used the 90 degree air intake up side the float bowl threaded for a filter screen, not the angled intake. Mounting flange same as a T but I have seen some with 1 1/4" bore instead of 1 1/8".
Brush used a 3/4" flanged attachment. I have a large 1-1/4" threaded Kingston 5-ball that was used on early tractors, marine, and stationary engines. The carbs came in sizes from 3/4" to 3" using standard pipe thread. In the 1907 Truscott boat and auto supply co. catalog they show all Kingston carbs with threaded connections. I believe the flanged auto carbs came out in 1908/9. Thanks for posting. That is an interesting carb.
It's large. Min 1.5 inch maybe a little bit larger.
The inlet threads are pipe threads, standard sizes, the smallest I have seen is 1/2 pipe, the largest I've seen is 1 1/2 pipe. They made a whole series of flange sizes in most of the pipe thread sizes. Made it easy to fit a carb to nearly any size flange.
They were used on all sorts of engines, tractors, stationery engines, cars -- whatever ran on gas or kerosene. I have a whole shelf full of various sizes and my experience is that they are hard to sell for anything but Evinrude boat engines and Model T's. I have two or three small ones now that I can't get sold, probably a dozen big ones but none for Model T.
I don't know if this one is correct for a Brush but the guy I bought it from had it rebuild as a backup for his Brush, it is exactly the same as the one I did for his Brush, he says it is the original carb on the car. He bought it unrestored in the 50's.
BTW, this is not MY rebuild. This is the one I bought that he had rebuilt somewhere. I do better work than this including fixing all the bad threads in the intake flange and never using a Phillips screw in anything old. =)