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SO-MO used the all-new Stromberg 97 model carburetors from Stromberg Ltd. for this installation. These have the factory-installed No. 45 jets and No. 65 power valve. The winter/summer setting has been left in the winter position. You can see the SW at the base of the photo next to the accelerator pump arm connection. This setting determines the amount of fuel the accelerator pump discharges upon initial acceleration. SO-MO has found that the factory winter setting works in most applications. It can be changed to lean out the mixture if required.