What are the carburetor model number designations?
The MA-3, -4, -5 etc. designates the mounting flange and size where the carburetor mounts to the sump. The “S” indicates a larger throttle bore dimension. The “P” designation indicates the carburetor is equipped with an accelerator pump and an “A” designation indicates the carburetor has an altitude mixture control which the pilot can use to manually lean the engine in flight.
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