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Which Is Low Side / High Side Screw?

hotajax

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Which screw is which if the carb is not stamped? My mind is turning to crap. I feel like Sleepy JJoe for asking, but I don't wear Attends. Thanks.
 

EFSM

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If you think about how the carburetor works, it makes sense. The main jet is fairly close to the choke side of the carburetor, but the idle jets are past the throttle plate.
 
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