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  5. Accelerator Pump Circuit
Watch a video about how the accelerator pump circuit works, including how to test your accelerator pump.



Accelerator Pump

Main Discharge
This is where the fuel comes out when stepping on the gas. Some YH carbs use a check ball (the bigger steel) and a spring (you can use a 2nd check ball in place of the spring) and others use a check weight only.
Ethanol Defender
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