Carb ID

[Bushwacker]

The attached photo is a carb installed into a 1961 Series 2 I recently purchased. Does anyone know what type of Carburetor it is? Is it worth changing things back to the original oil bath air cleaner set up - seems last owner was convinced to remove that and replace with this carb and filter?

Any ideas on how to tune this and stop the diabolical volume of smoke out the back would also be appreciated by me and all those driving behind me! Thanks

[acpatsouris]

It appears to be a Rochester Model B. It's a pretty common replacement carb.

[Bushwacker]

Thanks acpatsouris I was never going to figure that one out having not heard of them. Do you have any view on reverting back to the oil bath filter set up vs leaving as is?

[siiirhd88]

You can run the oil bath air filter with the Rochester B. The Rochester can be taller than the stock carbs so you might need to remove a bit of the carb intake elbow and shorten the rubber connecting ring to prevent the elbow from rubbing on the underside of the bonnet. There are a few different diameters of carb elbows, so you might need a different one to match the carb.

Bob

[Bushwacker]

Thanks siiirhd88 I will try and locate an oil bath and see how I get on.

[acpatsouris]

Either setup should work as far as cleaning the air entering the carb. I guess an oil bath for originality would be the preferred setup. We, from time to time, have used assemblies available.

[Bushwacker]

Thanks acpatsouris is there somewhere I can see the used ones coming up?

[charles1943]

The Rochester B was designed for a large displacement 6-cylinder GM engine and was sold for years by "A certain Co."...ill advisedly. They all but DROWN the engine with fuel and, IMPO they were grossly inappropriate for the 2 1/4 engine

[siiirhd88]

I ran a Rochester B on my 88 and 109 for several years without problems. It doesn't supply the MPG of a Weber carb, but it doesn't have the jet fouling problem of the Weber or the warp issue of the Zenith. It is my favorite carb on the 2.25.

Bob

[Bushwacker]

Hisiiirhd88 did you experience any of the aforementioned drowning in fuel issues? Also did you have it hooked up to the oil bath filter or an alternative?