Reply To: Neptune model 500 carb/ Tillotson HS93A

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July 17, 2025 at 9:59 pm #298248
CHUCK
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    JOSEPH BRINCAT wrote:

    Correct me if wrong , but Tillotson carb low speed is an air bleed , so closing the needle richens , opening leans. Just the opposite from what might expect And might explain why you are having trouble.

    Joe B

    Joe;  is there a way to tell by looking at a carburetor whether it is an air bleed design?