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  1. middlecalf

    2F engine running rough

    I don’t know anything about Webers, and only a little about Aisins and various Carters. When a carb “craps out,” that’s usually from dirt or bad fuel, sometimes a float will have a catastrophic failure (leak) and fill with fuel and then the carb floods. I can’t speak to the mismatch issue...
  2. middlecalf

    2F engine running rough

    So I’d say the stumble is from the fuel end of things to include potential vacuum leak (idle vacuum looks great though). Do you have a manual choke, and if so have you tried chocking it a bit to see if the loaded stumble goes away (and idle smooths out albeit at higher rpm’s)?
  3. middlecalf

    2F engine running rough

    Any smoke out the exhaust, and if so, under what conditions and what color?
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