Holley 1920 diaphram return spring

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There's no diaphragm return spring except on the '62-'63 1920s with round accelerator pump diaphragm stem. The '64-up units with flat stem have a drive spring but no return spring.


I know this is an old thread , I have been reading as many as I can to learn about rebuilding these 1920's. So I didn't find the spring when I toke it apart , so I ordered the spring from Mike's , it is for a 1904 , but some where on his site he stated to another customer it was better to use it , then not have one? So I'm confused as to use it or not? P1070224.JPG I don't know what year this carb is from , or what it came on . I was having some stumble from a dead stop , and looking down the carbs with engine not running this carb was not squirting much fuel at all. After the rebuild , and putting the spring in it , now I don't see it squirting from that area at all , looks like fuel is only coming from the bottom section of the carb. Stumble is still there. I did not rebuild the metering block , I did spray all holes with cleaner , and air. The first photo - no fuel coming out of the slot on the left side , above the larger hole , fuel comes out of thin tubes on the bottom of carb .